diff --git a/apps/web/core/components/issues/attachment/attachment-item-list.tsx b/apps/web/core/components/issues/attachment/attachment-item-list.tsx
index 4341e5c9510..9dc9e9c41fa 100644
--- a/apps/web/core/components/issues/attachment/attachment-item-list.tsx
+++ b/apps/web/core/components/issues/attachment/attachment-item-list.tsx
@@ -4,13 +4,11 @@
  * See the LICENSE file for details.
  */
 
-import { useCallback, useState } from "react";
+import { useCallback } from "react";
 import { observer } from "mobx-react";
-import type { FileRejection } from "react-dropzone";
 import { useDropzone } from "react-dropzone";
 import { UploadCloud } from "lucide-react";
 import { useTranslation } from "@plane/i18n";
-import { TOAST_TYPE, setToast } from "@plane/propel/toast";
 import type { TIssueServiceType } from "@plane/types";
 import { EIssueServiceType } from "@plane/types";
 // hooks
@@ -19,6 +17,7 @@ import { useIssueDetail } from "@/hooks/store/use-issue-detail";
 import { useFileSize } from "@/hooks/use-file-size";
 // types
 import type { TAttachmentHelpers } from "../issue-detail-widgets/attachments/helper";
+import { useAttachmentDropHandler } from "../issue-detail-widgets/attachments/helper";
 // components
 import { IssueAttachmentsListItem } from "./attachment-list-item";
 import { IssueAttachmentsUploadItem } from "./attachment-list-upload-item";
@@ -44,8 +43,6 @@ export const IssueAttachmentItemList = observer(function IssueAttachmentItemList
     issueServiceType = EIssueServiceType.ISSUES,
   } = props;
   const { t } = useTranslation();
-  // states
-  const [isUploading, setIsUploading] = useState(false);
   // store hooks
   const {
     attachment: { getAttachmentsByIssueId },
@@ -62,58 +59,27 @@ export const IssueAttachmentItemList = observer(function IssueAttachmentItemList
   const issueAttachments = getAttachmentsByIssueId(issueId);
 
   // handlers
-  const handleFetchPropertyActivities = useCallback(() => {
+  const handleUploadSettled = useCallback(() => {
     fetchActivities(workspaceSlug, projectId, issueId);
   }, [fetchActivities, workspaceSlug, projectId, issueId]);
 
-  const onDrop = useCallback(
-    (acceptedFiles: File[], rejectedFiles: FileRejection[]) => {
-      const totalAttachedFiles = acceptedFiles.length + rejectedFiles.length;
-
-      if (rejectedFiles.length === 0) {
-        const currentFile: File = acceptedFiles[0];
-        if (!currentFile || !workspaceSlug) return;
-
-        setIsUploading(true);
-        createAttachment(currentFile)
-          .catch(() => {
-            setToast({
-              type: TOAST_TYPE.ERROR,
-              title: t("toast.error"),
-              message: t("attachment.error"),
-            });
-          })
-          .finally(() => {
-            handleFetchPropertyActivities();
-            setIsUploading(false);
-          });
-        return;
-      }
-
-      setToast({
-        type: TOAST_TYPE.ERROR,
-        title: t("toast.error"),
-        message:
-          totalAttachedFiles > 1
-            ? t("attachment.only_one_file_allowed")
-            : t("attachment.file_size_limit", { size: maxFileSize / 1024 / 1024 }),
-      });
-      return;
-    },
-    [createAttachment, maxFileSize, workspaceSlug, handleFetchPropertyActivities]
-  );
+  const { onDrop, isUploading } = useAttachmentDropHandler({
+    create: createAttachment,
+    maxFileSize,
+    onUploadSettled: handleUploadSettled,
+  });
 
   const { getRootProps, getInputProps, isDragActive } = useDropzone({
     onDrop,
     maxSize: maxFileSize,
-    multiple: false,
-    disabled: isUploading || disabled,
+    multiple: true,
+    disabled: isUploading || disabled || !workspaceSlug,
   });
 
   return (
     <>
-      {uploadStatus?.map((uploadStatus) => (
-        <IssueAttachmentsUploadItem key={uploadStatus.id} uploadStatus={uploadStatus} />
+      {uploadStatus?.map((status) => (
+        <IssueAttachmentsUploadItem key={status.id} uploadStatus={status} />
       ))}
       {issueAttachments && (
         <>
diff --git a/apps/web/core/components/issues/attachment/attachment-upload.tsx b/apps/web/core/components/issues/attachment/attachment-upload.tsx
index 2a37b3b985c..281dcda8f5d 100644
--- a/apps/web/core/components/issues/attachment/attachment-upload.tsx
+++ b/apps/web/core/components/issues/attachment/attachment-upload.tsx
@@ -4,13 +4,13 @@
  * See the LICENSE file for details.
  */
 
-import { useCallback, useState } from "react";
 import { observer } from "mobx-react";
 import { useDropzone } from "react-dropzone";
 // plane web hooks
 import { useFileSize } from "@/hooks/use-file-size";
 // types
 import type { TAttachmentOperations } from "../issue-detail-widgets/attachments/helper";
+import { useAttachmentDropHandler } from "../issue-detail-widgets/attachments/helper";
 
 type TAttachmentOperationsModal = Pick<TAttachmentOperations, "create">;
 
@@ -22,32 +22,21 @@ type Props = {
 
 export const IssueAttachmentUpload = observer(function IssueAttachmentUpload(props: Props) {
   const { workspaceSlug, disabled = false, attachmentOperations } = props;
-  // states
-  const [isLoading, setIsLoading] = useState(false);
   // file size
   const { maxFileSize } = useFileSize();
+  // drop handler
+  const { onDrop, progress, isUploading } = useAttachmentDropHandler({
+    create: attachmentOperations.create,
+    maxFileSize,
+  });
 
-  const onDrop = useCallback(
-    (acceptedFiles: File[]) => {
-      const currentFile: File = acceptedFiles[0];
-      if (!currentFile || !workspaceSlug) return;
-
-      setIsLoading(true);
-      attachmentOperations.create(currentFile).finally(() => setIsLoading(false));
-    },
-    [attachmentOperations, workspaceSlug]
-  );
-
-  const { getRootProps, getInputProps, isDragActive, isDragReject, fileRejections } = useDropzone({
+  const { getRootProps, getInputProps, isDragActive, isDragReject } = useDropzone({
     onDrop,
     maxSize: maxFileSize,
-    multiple: false,
-    disabled: isLoading || disabled,
+    multiple: true,
+    disabled: isUploading || disabled || !workspaceSlug,
   });
 
-  const fileError =
-    fileRejections.length > 0 ? `Invalid file type or size (max ${maxFileSize / 1024 / 1024} MB)` : null;
-
   return (
     <div
       {...getRootProps()}
@@ -59,12 +48,14 @@ export const IssueAttachmentUpload = observer(function IssueAttachmentUpload(pro
       <span className="flex items-center gap-2">
         {isDragActive ? (
           <p>Drop here...</p>
-        ) : fileError ? (
-          <p className="text-center text-danger-primary">{fileError}</p>
-        ) : isLoading ? (
-          <p className="text-center">Uploading...</p>
+        ) : progress ? (
+          <p className="text-center">
+            {/* Files finished, not the file being worked on: uploads run concurrently, so
+                there is no single "current" file to point at. */}
+            {progress.total > 1 ? `Uploading ${progress.completed}/${progress.total}...` : "Uploading..."}
+          </p>
         ) : (
-          <p className="text-center">Click or drag a file here</p>
+          <p className="text-center">Click or drag files here</p>
         )}
       </span>
     </div>
diff --git a/apps/web/core/components/issues/issue-detail-widgets/attachments/helper.tsx b/apps/web/core/components/issues/issue-detail-widgets/attachments/helper.tsx
index e32dfbbd098..5f7aa60a1f7 100644
--- a/apps/web/core/components/issues/issue-detail-widgets/attachments/helper.tsx
+++ b/apps/web/core/components/issues/issue-detail-widgets/attachments/helper.tsx
@@ -4,8 +4,10 @@
  * See the LICENSE file for details.
  */
 
-import { useMemo } from "react";
-import { setPromiseToast, TOAST_TYPE, setToast } from "@plane/propel/toast";
+import { useCallback, useMemo, useState } from "react";
+import type { FileRejection } from "react-dropzone";
+import { useTranslation } from "@plane/i18n";
+import { TOAST_TYPE, setToast } from "@plane/propel/toast";
 import type { TIssueServiceType } from "@plane/types";
 import { EIssueServiceType } from "@plane/types";
 // hooks
@@ -13,8 +15,24 @@ import { useIssueDetail } from "@/hooks/store/use-issue-detail";
 // types
 import type { TAttachmentUploadStatus } from "@/store/issue/issue-details/attachment.store";
 
+/**
+ * Number of attachments uploaded in parallel. Dropping a folder of screenshots should not
+ * open one request per file, but a strict sequence makes a large batch needlessly slow.
+ */
+const UPLOAD_CONCURRENCY = 3;
+
+type TAttachmentUploadSummary = {
+  uploadedCount: number;
+  failedFileNames: string[];
+};
+
+export type TAttachmentUploadProgress = {
+  completed: number;
+  total: number;
+};
+
 export type TAttachmentOperations = {
-  create: (file: File) => Promise<void>;
+  create: (files: File[], onProgress?: (progress: TAttachmentUploadProgress) => void) => Promise<void>;
   remove: (attachmentId: string) => Promise<void>;
 };
 
@@ -27,34 +45,90 @@ export type TAttachmentHelpers = {
   snapshot: TAttachmentSnapshot;
 };
 
+/**
+ * Run `task` over every file, keeping at most `limit` uploads in flight. A rejected upload
+ * is recorded and never aborts the batch, so one bad file cannot discard the rest.
+ */
+const uploadWithConcurrency = async (
+  files: File[],
+  limit: number,
+  task: (file: File) => Promise<unknown>,
+  onSettled: (file: File, isSuccess: boolean) => void
+): Promise<void> => {
+  let cursor = 0;
+  const worker = async () => {
+    while (cursor < files.length) {
+      const file = files[cursor];
+      cursor += 1;
+      if (!file) continue;
+      try {
+        // Sequential by design: each worker drains the queue one file at a time so that
+        // `limit` bounds the in-flight uploads. Promise.all here would be unbounded.
+        // eslint-disable-next-line no-await-in-loop
+        await task(file);
+        onSettled(file, true);
+      } catch {
+        // The store logs the underlying error; the caller turns this into a user-facing message.
+        onSettled(file, false);
+      }
+    }
+  };
+  await Promise.all(Array.from({ length: Math.min(limit, files.length) }, worker));
+};
+
 export const useAttachmentOperations = (
   workspaceSlug: string,
   projectId: string,
   issueId: string,
   issueServiceType: TIssueServiceType = EIssueServiceType.ISSUES
 ): TAttachmentHelpers => {
+  const { t } = useTranslation();
   const {
     attachment: { createAttachment, removeAttachment, getAttachmentsUploadStatusByIssueId },
   } = useIssueDetail(issueServiceType);
 
   const attachmentOperations: TAttachmentOperations = useMemo(
     () => ({
-      create: async (file) => {
+      create: async (files, onProgress) => {
         if (!workspaceSlug || !projectId || !issueId) throw new Error("Missing required fields");
-        const attachmentUploadPromise = createAttachment(workspaceSlug, projectId, issueId, file);
-        setPromiseToast(attachmentUploadPromise, {
-          loading: "Uploading attachment...",
-          success: {
-            title: "Attachment uploaded",
-            message: () => "The attachment has been successfully uploaded",
-          },
-          error: {
-            title: "Attachment not uploaded",
-            message: () => "The attachment could not be uploaded",
-          },
-        });
+        if (files.length === 0) return;
+
+        const summary: TAttachmentUploadSummary = { uploadedCount: 0, failedFileNames: [] };
+        let completed = 0;
+
+        await uploadWithConcurrency(
+          files,
+          UPLOAD_CONCURRENCY,
+          (file) => createAttachment(workspaceSlug, projectId, issueId, file),
+          (file, isSuccess) => {
+            if (isSuccess) summary.uploadedCount += 1;
+            else summary.failedFileNames.push(file.name);
+            completed += 1;
+            onProgress?.({ completed, total: files.length });
+          }
+        );
+
+        // A partially successful batch keeps the uploaded files and names only the ones that failed.
+        if (summary.failedFileNames.length > 0) {
+          setToast({
+            type: TOAST_TYPE.ERROR,
+            title: t("attachment.upload_failed_title", { count: summary.failedFileNames.length }),
+            message:
+              summary.uploadedCount > 0
+                ? t("attachment.upload_partial_failure", {
+                    count: summary.uploadedCount,
+                    files: summary.failedFileNames.join(", "),
+                  })
+                : t("attachment.upload_failure", { files: summary.failedFileNames.join(", ") }),
+          });
+          return;
+        }
 
-        await attachmentUploadPromise;
+        setToast({
+          type: TOAST_TYPE.SUCCESS,
+          title: t("attachment.upload_success_title", { count: summary.uploadedCount }),
+          message: t("attachment.upload_success", { count: summary.uploadedCount }),
+        });
       },
       remove: async (attachmentId) => {
         try {
@@ -74,7 +148,7 @@ export const useAttachmentOperations = (
         }
       },
     }),
-    [workspaceSlug, projectId, issueId, createAttachment, removeAttachment]
+    [workspaceSlug, projectId, issueId, createAttachment, removeAttachment, t]
   );
   const attachmentsUploadStatus = getAttachmentsUploadStatusByIssueId(issueId);
 
@@ -83,3 +157,63 @@ export const useAttachmentOperations = (
     snapshot: { uploadStatus: attachmentsUploadStatus },
   };
 };
+
+type TAttachmentDropHandlerArgs = {
+  create: TAttachmentOperations["create"];
+  maxFileSize: number;
+  /** Runs once per drop, after the whole batch settles. */
+  onUploadSettled?: () => void;
+};
+
+/**
+ * Shared `onDrop` for every work item attachment dropzone. Files rejected by the dropzone
+ * itself (over the size limit) are reported by name and the remaining ones still upload.
+ */
+export const useAttachmentDropHandler = (args: TAttachmentDropHandlerArgs) => {
+  const { create, maxFileSize, onUploadSettled } = args;
+  const { t } = useTranslation();
+  // states
+  const [progress, setProgress] = useState<TAttachmentUploadProgress | null>(null);
+
+  const onDrop = useCallback(
+    async (acceptedFiles: File[], rejectedFiles: FileRejection[]) => {
+      if (rejectedFiles.length > 0) {
+        setToast({
+          type: TOAST_TYPE.ERROR,
+          title: t("toast.error"),
+          message: t("attachment.files_too_large", {
+            count: rejectedFiles.length,
+            size: maxFileSize / 1024 / 1024,
+            files: rejectedFiles.map((rejection) => rejection.file.name).join(", "),
+          }),
+        });
+      }
+
+      if (acceptedFiles.length === 0) return;
+
+      setProgress({ completed: 0, total: acceptedFiles.length });
+      try {
+        await create(acceptedFiles, setProgress);
+      } catch (error) {
+        // Per-file failures are already reported by `create`; this only catches a batch that
+        // never started, such as a missing workspace or project id.
+        console.error("Error in uploading issue attachments:", error);
+        setToast({
+          type: TOAST_TYPE.ERROR,
+          title: t("toast.error"),
+          message: t("attachment.error"),
+        });
+      } finally {
+        setProgress(null);
+        onUploadSettled?.();
+      }
+    },
+    [create, maxFileSize, onUploadSettled, t]
+  );
+
+  return {
+    onDrop,
+    progress,
+    isUploading: progress !== null,
+  };
+};
diff --git a/apps/web/core/components/issues/issue-detail-widgets/attachments/quick-action-button.tsx b/apps/web/core/components/issues/issue-detail-widgets/attachments/quick-action-button.tsx
index dc6155550f0..e27ad30d273 100644
--- a/apps/web/core/components/issues/issue-detail-widgets/attachments/quick-action-button.tsx
+++ b/apps/web/core/components/issues/issue-detail-widgets/attachments/quick-action-button.tsx
@@ -4,20 +4,18 @@
  * See the LICENSE file for details.
  */
 
-import React, { useCallback, useState } from "react";
+import React, { useCallback } from "react";
 import { observer } from "mobx-react";
-import type { FileRejection } from "react-dropzone";
 import { useDropzone } from "react-dropzone";
 import { PlusIcon } from "@plane/propel/icons";
 // plane imports
-import { TOAST_TYPE, setToast } from "@plane/propel/toast";
 import type { TIssueServiceType } from "@plane/types";
 // hooks
 import { useIssueDetail } from "@/hooks/store/use-issue-detail";
 // plane web hooks
 import { useFileSize } from "@/hooks/use-file-size";
 // local imports
-import { useAttachmentOperations } from "./helper";
+import { useAttachmentDropHandler, useAttachmentOperations } from "./helper";
 
 type Props = {
   workspaceSlug: string;
@@ -30,8 +28,6 @@ type Props = {
 
 export const IssueAttachmentActionButton = observer(function IssueAttachmentActionButton(props: Props) {
   const { workspaceSlug, projectId, issueId, customButton, disabled = false, issueServiceType } = props;
-  // state
-  const [isLoading, setIsLoading] = useState(false);
   // store hooks
   const { setLastWidgetAction, fetchActivities } = useIssueDetail(issueServiceType);
   // file size
@@ -44,64 +40,39 @@ export const IssueAttachmentActionButton = observer(function IssueAttachmentActi
     issueServiceType
   );
   // handlers
-  const handleFetchPropertyActivities = useCallback(() => {
+  const handleUploadSettled = useCallback(() => {
     fetchActivities(workspaceSlug, projectId, issueId);
-  }, [fetchActivities, workspaceSlug, projectId, issueId]);
+    setLastWidgetAction("attachments");
+  }, [fetchActivities, workspaceSlug, projectId, issueId, setLastWidgetAction]);
 
-  const onDrop = useCallback(
-    (acceptedFiles: File[], rejectedFiles: FileRejection[]) => {
-      const totalAttachedFiles = acceptedFiles.length + rejectedFiles.length;
-
-      if (rejectedFiles.length === 0) {
-        const currentFile: File = acceptedFiles[0];
-        if (!currentFile || !workspaceSlug) return;
-
-        setIsLoading(true);
-        attachmentOperations
-          .create(currentFile)
-          .catch(() => {
-            setToast({
-              type: TOAST_TYPE.ERROR,
-              title: "Error!",
-              message: "File could not be attached. Try uploading again.",
-            });
-          })
-          .finally(() => {
-            handleFetchPropertyActivities();
-            setLastWidgetAction("attachments");
-            setIsLoading(false);
-          });
-        return;
-      }
+  const { onDrop, isUploading } = useAttachmentDropHandler({
+    create: attachmentOperations.create,
+    maxFileSize,
+    onUploadSettled: handleUploadSettled,
+  });
 
-      setToast({
-        type: TOAST_TYPE.ERROR,
-        title: "Error!",
-        message:
-          totalAttachedFiles > 1
-            ? "Only one file can be uploaded at a time."
-            : `File must be of ${maxFileSize / 1024 / 1024}MB or less in size.`,
-      });
-      return;
-    },
-    [attachmentOperations, maxFileSize, workspaceSlug, handleFetchPropertyActivities, setLastWidgetAction]
-  );
+  // react-dropzone does not forward its disabled state to the root element, so the native
+  // button has to be given the same condition or it stays clickable while doing nothing.
+  const isDropzoneDisabled = isUploading || disabled || !workspaceSlug;
 
   const { getRootProps, getInputProps } = useDropzone({
     onDrop,
     maxSize: maxFileSize,
-    multiple: false,
-    disabled: isLoading || disabled,
+    multiple: true,
+    disabled: isDropzoneDisabled,
   });
 
   return (
+    // Presentational wrapper: the button below is the real control, this only keeps the
+    // click from bubbling to the surrounding work item row.
+    // TODO: Remove extra div and move event propagation to button
     <div
+      role="presentation"
       onClick={(e) => {
-        // TODO: Remove extra div and move event propagation to button
         e.stopPropagation();
       }}
     >
-      <button {...getRootProps()} type="button" disabled={disabled}>
+      <button {...getRootProps()} type="button" disabled={isDropzoneDisabled}>
         <input {...getInputProps()} />
         {customButton ? customButton : <PlusIcon className="h-4 w-4" />}
       </button>
diff --git a/packages/i18n/src/locales/cs/common.json b/packages/i18n/src/locales/cs/common.json
index c1e9372c24e..b065293507a 100644
--- a/packages/i18n/src/locales/cs/common.json
+++ b/packages/i18n/src/locales/cs/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Soubor nelze připojit. Zkuste to prosím znovu.",
-    "only_one_file_allowed": "Je možné nahrát pouze jeden soubor najednou.",
-    "file_size_limit": "Soubor musí být menší než {size}MB.",
     "drag_and_drop": "Přetáhněte soubor kamkoli pro nahrání",
-    "delete": "Smazat přílohu"
+    "delete": "Smazat přílohu",
+    "files_too_large": "Přeskočeno {count, plural, one {# soubor} few {# soubory} many {# souboru} other {# souborů}} kvůli překročení limitu {size} MB: {files}",
+    "upload_success_title": "{count, plural, one {Příloha nahrána} few {Přílohy nahrány} many {Přílohy nahrány} other {Přílohy nahrány}}",
+    "upload_success": "{count, plural, one {Přidán # soubor.} few {Přidány # soubory.} many {Přidáno # souboru.} other {Přidáno # souborů.}}",
+    "upload_failed_title": "{count, plural, one {Příloha nenahrána} few {Přílohy nenahrány} many {Přílohy nenahrány} other {Přílohy nenahrány}}",
+    "upload_partial_failure": "{count, plural, one {Přidán # soubor.} few {Přidány # soubory.} many {Přidáno # souboru.} other {Přidáno # souborů.}} Nepodařilo se přidat: {files}",
+    "upload_failure": "Nepodařilo se přidat: {files}. Zkuste to prosím znovu."
   },
   "label": {
     "select": "Vybrat štítek",
diff --git a/packages/i18n/src/locales/de/common.json b/packages/i18n/src/locales/de/common.json
index 1e18d4ee26e..36fd3ee1c59 100644
--- a/packages/i18n/src/locales/de/common.json
+++ b/packages/i18n/src/locales/de/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Datei konnte nicht angehängt werden. Bitte versuchen Sie es erneut.",
-    "only_one_file_allowed": "Es kann jeweils nur eine Datei hochgeladen werden.",
-    "file_size_limit": "Die Datei muss kleiner als {size} MB sein.",
     "drag_and_drop": "Datei hierher ziehen, um sie hochzuladen",
-    "delete": "Anhang löschen"
+    "delete": "Anhang löschen",
+    "files_too_large": "{count, plural, one {# Datei wurde} other {# Dateien wurden}} übersprungen – Limit von {size} MB überschritten: {files}",
+    "upload_success_title": "{count, plural, one {Anhang hochgeladen} other {Anhänge hochgeladen}}",
+    "upload_success": "{count, plural, one {# Datei wurde angehängt.} other {# Dateien wurden angehängt.}}",
+    "upload_failed_title": "{count, plural, one {Anhang nicht hochgeladen} other {Anhänge nicht hochgeladen}}",
+    "upload_partial_failure": "{count, plural, one {# Datei wurde angehängt.} other {# Dateien wurden angehängt.}} Nicht angehängt: {files}",
+    "upload_failure": "Nicht angehängt: {files}. Bitte erneut versuchen."
   },
   "label": {
     "select": "Label auswählen",
diff --git a/packages/i18n/src/locales/en/common.json b/packages/i18n/src/locales/en/common.json
index a138304371e..8a0f93aeec3 100644
--- a/packages/i18n/src/locales/en/common.json
+++ b/packages/i18n/src/locales/en/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "File could not be attached. Try uploading again.",
-    "only_one_file_allowed": "Only one file can be uploaded at a time.",
-    "file_size_limit": "File must be of {size}MB or less in size.",
     "drag_and_drop": "Drag and drop anywhere to upload",
-    "delete": "Delete attachment"
+    "delete": "Delete attachment",
+    "files_too_large": "Skipped {count, plural, one {# file} other {# files}} over the {size}MB limit: {files}",
+    "upload_success_title": "{count, plural, one {Attachment uploaded} other {Attachments uploaded}}",
+    "upload_success": "{count, plural, one {# file has been attached.} other {# files have been attached.}}",
+    "upload_failed_title": "{count, plural, one {Attachment not uploaded} other {Attachments not uploaded}}",
+    "upload_partial_failure": "{count, plural, one {# file was attached.} other {# files were attached.}} Could not attach: {files}",
+    "upload_failure": "Could not attach: {files}. Try uploading again."
   },
   "label": {
     "select": "Add labels",
diff --git a/packages/i18n/src/locales/es/common.json b/packages/i18n/src/locales/es/common.json
index 64440c9c653..57a4d8b56bb 100644
--- a/packages/i18n/src/locales/es/common.json
+++ b/packages/i18n/src/locales/es/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "No se pudo adjuntar el archivo. Intenta subirlo de nuevo.",
-    "only_one_file_allowed": "Solo se puede subir un archivo a la vez.",
-    "file_size_limit": "El archivo debe tener {size}MB o menos de tamaño.",
     "drag_and_drop": "Arrastra y suelta en cualquier lugar para subir",
-    "delete": "Eliminar archivo adjunto"
+    "delete": "Eliminar archivo adjunto",
+    "files_too_large": "Se {count, plural, one {omitió # archivo} other {omitieron # archivos}} por superar el límite de {size} MB: {files}",
+    "upload_success_title": "{count, plural, one {Archivo adjuntado} other {Archivos adjuntados}}",
+    "upload_success": "{count, plural, one {Se adjuntó # archivo.} other {Se adjuntaron # archivos.}}",
+    "upload_failed_title": "{count, plural, one {Archivo no adjuntado} other {Archivos no adjuntados}}",
+    "upload_partial_failure": "{count, plural, one {Se adjuntó # archivo.} other {Se adjuntaron # archivos.}} No se pudo adjuntar: {files}",
+    "upload_failure": "No se pudo adjuntar: {files}. Inténtelo de nuevo."
   },
   "label": {
     "select": "Seleccionar etiqueta",
diff --git a/packages/i18n/src/locales/fr/common.json b/packages/i18n/src/locales/fr/common.json
index a94ab8aba2d..164860feb6f 100644
--- a/packages/i18n/src/locales/fr/common.json
+++ b/packages/i18n/src/locales/fr/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Le fichier n’a pas pu être joint. Essayez de le télécharger à nouveau.",
-    "only_one_file_allowed": "Un seul fichier peut être téléchargé à la fois.",
-    "file_size_limit": "Le fichier doit faire {size}MB ou moins.",
     "drag_and_drop": "Glissez-déposez n’importe où pour uploader",
-    "delete": "Supprimer la pièce jointe"
+    "delete": "Supprimer la pièce jointe",
+    "files_too_large": "{count, plural, one {# fichier ignoré} many {# fichiers ignorés} other {# fichiers ignorés}} car au-delà de la limite de {size} Mo : {files}",
+    "upload_success_title": "{count, plural, one {Pièce jointe ajoutée} many {Pièces jointes ajoutées} other {Pièces jointes ajoutées}}",
+    "upload_success": "{count, plural, one {# fichier a été joint.} many {# fichiers ont été joints.} other {# fichiers ont été joints.}}",
+    "upload_failed_title": "{count, plural, one {Pièce jointe non ajoutée} many {Pièces jointes non ajoutées} other {Pièces jointes non ajoutées}}",
+    "upload_partial_failure": "{count, plural, one {# fichier a été joint.} many {# fichiers ont été joints.} other {# fichiers ont été joints.}} Impossible de joindre : {files}",
+    "upload_failure": "Impossible de joindre : {files}. Veuillez réessayer."
   },
   "label": {
     "select": "Sélectionner une étiquette",
diff --git a/packages/i18n/src/locales/id/common.json b/packages/i18n/src/locales/id/common.json
index 7d266850dc4..37bf2404104 100644
--- a/packages/i18n/src/locales/id/common.json
+++ b/packages/i18n/src/locales/id/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "File tidak dapat dilampirkan. Coba unggah lagi.",
-    "only_one_file_allowed": "Hanya satu file yang dapat diunggah pada satu waktu.",
-    "file_size_limit": "File harus berukuran {size}MB atau lebih kecil.",
     "drag_and_drop": "Seret dan jatuhkan di mana saja untuk mengunggah",
-    "delete": "Hapus lampiran"
+    "delete": "Hapus lampiran",
+    "files_too_large": "Melewati {count, plural, one {# berkas} other {# berkas}} yang melebihi batas {size} MB: {files}",
+    "upload_success_title": "{count, plural, one {Lampiran diunggah} other {Lampiran diunggah}}",
+    "upload_success": "{count, plural, one {# berkas telah dilampirkan.} other {# berkas telah dilampirkan.}}",
+    "upload_failed_title": "{count, plural, one {Lampiran tidak diunggah} other {Lampiran tidak diunggah}}",
+    "upload_partial_failure": "{count, plural, one {# berkas telah dilampirkan.} other {# berkas telah dilampirkan.}} Tidak dapat melampirkan: {files}",
+    "upload_failure": "Tidak dapat melampirkan: {files}. Silakan coba lagi."
   },
   "label": {
     "select": "Pilih label",
diff --git a/packages/i18n/src/locales/it/common.json b/packages/i18n/src/locales/it/common.json
index 6fda1b04957..41e617e7a6c 100644
--- a/packages/i18n/src/locales/it/common.json
+++ b/packages/i18n/src/locales/it/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Impossibile allegare il file. Riprova a caricarlo.",
-    "only_one_file_allowed": "È possibile caricare un solo file alla volta.",
-    "file_size_limit": "Il file deve essere di {size}MB o meno.",
     "drag_and_drop": "Trascina e rilascia ovunque per caricare",
-    "delete": "Elimina allegato"
+    "delete": "Elimina allegato",
+    "files_too_large": "{count, plural, one {# file ignorato} many {# file ignorati} other {# file ignorati}} perché supera il limite di {size} MB: {files}",
+    "upload_success_title": "{count, plural, one {Allegato caricato} many {Allegati caricati} other {Allegati caricati}}",
+    "upload_success": "{count, plural, one {# file è stato allegato.} many {# file sono stati allegati.} other {# file sono stati allegati.}}",
+    "upload_failed_title": "{count, plural, one {Allegato non caricato} many {Allegati non caricati} other {Allegati non caricati}}",
+    "upload_partial_failure": "{count, plural, one {# file è stato allegato.} many {# file sono stati allegati.} other {# file sono stati allegati.}} Impossibile allegare: {files}",
+    "upload_failure": "Impossibile allegare: {files}. Riprovare."
   },
   "label": {
     "select": "Seleziona etichetta",
diff --git a/packages/i18n/src/locales/ja/common.json b/packages/i18n/src/locales/ja/common.json
index 4899411b615..4360279759d 100644
--- a/packages/i18n/src/locales/ja/common.json
+++ b/packages/i18n/src/locales/ja/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "ファイルを添付できませんでした。もう一度アップロードしてください。",
-    "only_one_file_allowed": "一度にアップロードできるファイルは1つだけです。",
-    "file_size_limit": "ファイルサイズは{size}MB以下である必要があります。",
     "drag_and_drop": "どこにでもドラッグ＆ドロップでアップロード",
-    "delete": "添付ファイルを削除"
+    "delete": "添付ファイルを削除",
+    "files_too_large": "{size}MB の上限を超えたため、{count, plural, one {# 件} other {# 件}}のファイルをスキップしました：{files}",
+    "upload_success_title": "{count, plural, one {添付ファイルをアップロードしました} other {添付ファイルをアップロードしました}}",
+    "upload_success": "{count, plural, one {# 件のファイルを添付しました。} other {# 件のファイルを添付しました。}}",
+    "upload_failed_title": "{count, plural, one {添付ファイルをアップロードできませんでした} other {添付ファイルをアップロードできませんでした}}",
+    "upload_partial_failure": "{count, plural, one {# 件のファイルを添付しました。} other {# 件のファイルを添付しました。}}添付できませんでした：{files}",
+    "upload_failure": "添付できませんでした：{files}。もう一度お試しください。"
   },
   "label": {
     "select": "ラベルを選択",
diff --git a/packages/i18n/src/locales/ko/common.json b/packages/i18n/src/locales/ko/common.json
index 73eea6b1c25..0c07f98d465 100644
--- a/packages/i18n/src/locales/ko/common.json
+++ b/packages/i18n/src/locales/ko/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "파일을 첨부할 수 없습니다. 다시 업로드하세요.",
-    "only_one_file_allowed": "한 번에 하나의 파일만 업로드할 수 있습니다.",
-    "file_size_limit": "파일 크기는 {size}MB 이하이어야 합니다.",
     "drag_and_drop": "업로드하려면 아무 곳에나 드래그 앤 드롭하세요",
-    "delete": "첨부 파일 삭제"
+    "delete": "첨부 파일 삭제",
+    "files_too_large": "{size}MB 제한을 초과한 파일 {count, plural, one {#개} other {#개}}를 건너뛰었습니다: {files}",
+    "upload_success_title": "{count, plural, one {첨부 파일 업로드 완료} other {첨부 파일 업로드 완료}}",
+    "upload_success": "{count, plural, one {파일 #개를 첨부했습니다.} other {파일 #개를 첨부했습니다.}}",
+    "upload_failed_title": "{count, plural, one {첨부 파일 업로드 실패} other {첨부 파일 업로드 실패}}",
+    "upload_partial_failure": "{count, plural, one {파일 #개를 첨부했습니다.} other {파일 #개를 첨부했습니다.}} 첨부하지 못한 파일: {files}",
+    "upload_failure": "다음 파일을 첨부하지 못했습니다: {files}. 다시 시도해 주십시오."
   },
   "label": {
     "select": "레이블 선택",
diff --git a/packages/i18n/src/locales/pl/common.json b/packages/i18n/src/locales/pl/common.json
index 4c4850cbf66..b4f9607014e 100644
--- a/packages/i18n/src/locales/pl/common.json
+++ b/packages/i18n/src/locales/pl/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Nie udało się dodać pliku. Spróbuj ponownie.",
-    "only_one_file_allowed": "Możesz przesłać tylko jeden plik naraz.",
-    "file_size_limit": "Plik musi być mniejszy niż {size}MB.",
     "drag_and_drop": "Przeciągnij plik w dowolne miejsce, aby przesłać",
-    "delete": "Usuń załącznik"
+    "delete": "Usuń załącznik",
+    "files_too_large": "Pominięto {count, plural, one {# plik} few {# pliki} many {# plików} other {# pliku}} z powodu przekroczenia limitu {size} MB: {files}",
+    "upload_success_title": "{count, plural, one {Załącznik przesłany} few {Załączniki przesłane} many {Załączniki przesłane} other {Załączniki przesłane}}",
+    "upload_success": "Dodano {count, plural, one {# plik} few {# pliki} many {# plików} other {# pliku}}.",
+    "upload_failed_title": "{count, plural, one {Załącznik nieprzesłany} few {Załączniki nieprzesłane} many {Załączniki nieprzesłane} other {Załączniki nieprzesłane}}",
+    "upload_partial_failure": "Dodano {count, plural, one {# plik} few {# pliki} many {# plików} other {# pliku}}. Nie udało się dodać: {files}",
+    "upload_failure": "Nie udało się dodać: {files}. Proszę spróbować ponownie."
   },
   "label": {
     "select": "Wybierz etykietę",
diff --git a/packages/i18n/src/locales/pt-BR/common.json b/packages/i18n/src/locales/pt-BR/common.json
index 565e85d8739..7066f713542 100644
--- a/packages/i18n/src/locales/pt-BR/common.json
+++ b/packages/i18n/src/locales/pt-BR/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Não foi possível anexar o arquivo. Tente enviar novamente.",
-    "only_one_file_allowed": "Apenas um arquivo pode ser enviado por vez.",
-    "file_size_limit": "O arquivo deve ter {size}MB ou menos.",
     "drag_and_drop": "Arraste e solte em qualquer lugar para enviar",
-    "delete": "Excluir anexo"
+    "delete": "Excluir anexo",
+    "files_too_large": "{count, plural, one {# arquivo ignorado} many {# arquivos ignorados} other {# arquivos ignorados}} por exceder o limite de {size} MB: {files}",
+    "upload_success_title": "{count, plural, one {Anexo enviado} many {Anexos enviados} other {Anexos enviados}}",
+    "upload_success": "{count, plural, one {# arquivo foi anexado.} many {# arquivos foram anexados.} other {# arquivos foram anexados.}}",
+    "upload_failed_title": "{count, plural, one {Anexo não enviado} many {Anexos não enviados} other {Anexos não enviados}}",
+    "upload_partial_failure": "{count, plural, one {# arquivo foi anexado.} many {# arquivos foram anexados.} other {# arquivos foram anexados.}} Não foi possível anexar: {files}",
+    "upload_failure": "Não foi possível anexar: {files}. Tente enviar novamente."
   },
   "label": {
     "select": "Selecionar etiqueta",
diff --git a/packages/i18n/src/locales/ro/common.json b/packages/i18n/src/locales/ro/common.json
index e2b44ce87ec..812b7e11646 100644
--- a/packages/i18n/src/locales/ro/common.json
+++ b/packages/i18n/src/locales/ro/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Fișierul nu a putut fi atașat. Încearcă să încarci din nou.",
-    "only_one_file_allowed": "Se poate încărca doar un fișier o dată.",
-    "file_size_limit": "Fișierul trebuie să aibă {size}MB sau mai puțin.",
     "drag_and_drop": "Trage și plasează oriunde pentru a încărca",
-    "delete": "Șterge atașamentul"
+    "delete": "Șterge atașamentul",
+    "files_too_large": "{count, plural, one {# fișier a fost omis} few {# fișiere au fost omise} other {# de fișiere au fost omise}} pentru depășirea limitei de {size} MB: {files}",
+    "upload_success_title": "{count, plural, one {Atașament încărcat} few {Atașamente încărcate} other {Atașamente încărcate}}",
+    "upload_success": "{count, plural, one {# fișier a fost atașat.} few {# fișiere au fost atașate.} other {# de fișiere au fost atașate.}}",
+    "upload_failed_title": "{count, plural, one {Atașament neîncărcat} few {Atașamente neîncărcate} other {Atașamente neîncărcate}}",
+    "upload_partial_failure": "{count, plural, one {# fișier a fost atașat.} few {# fișiere au fost atașate.} other {# de fișiere au fost atașate.}} Nu s-au putut atașa: {files}",
+    "upload_failure": "Nu s-au putut atașa: {files}. Încercați din nou."
   },
   "label": {
     "select": "Selectează eticheta",
diff --git a/packages/i18n/src/locales/ru/common.json b/packages/i18n/src/locales/ru/common.json
index c2881e55f8a..3995942fe95 100644
--- a/packages/i18n/src/locales/ru/common.json
+++ b/packages/i18n/src/locales/ru/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Ошибка прикрепления файла",
-    "only_one_file_allowed": "Можно загрузить только один файл",
-    "file_size_limit": "Максимальный размер файла - {size} МБ",
     "drag_and_drop": "Перетащите файл для загрузки",
-    "delete": "Удалить вложение"
+    "delete": "Удалить вложение",
+    "files_too_large": "{count, plural, one {Пропущен # файл} few {Пропущено # файла} many {Пропущено # файлов} other {Пропущено # файла}} из-за превышения лимита {size} МБ: {files}",
+    "upload_success_title": "{count, plural, one {Вложение загружено} few {Вложения загружены} many {Вложения загружены} other {Вложения загружены}}",
+    "upload_success": "{count, plural, one {Прикреплён # файл.} few {Прикреплено # файла.} many {Прикреплено # файлов.} other {Прикреплено # файла.}}",
+    "upload_failed_title": "{count, plural, one {Вложение не загружено} few {Вложения не загружены} many {Вложения не загружены} other {Вложения не загружены}}",
+    "upload_partial_failure": "{count, plural, one {Прикреплён # файл.} few {Прикреплено # файла.} many {Прикреплено # файлов.} other {Прикреплено # файла.}} Не удалось прикрепить: {files}",
+    "upload_failure": "Не удалось прикрепить: {files}. Попробуйте ещё раз."
   },
   "label": {
     "select": "Выбрать метку",
diff --git a/packages/i18n/src/locales/sk/common.json b/packages/i18n/src/locales/sk/common.json
index 4fc339cece6..057047d310c 100644
--- a/packages/i18n/src/locales/sk/common.json
+++ b/packages/i18n/src/locales/sk/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Súbor sa nedá pripojiť. Skúste to prosím znova.",
-    "only_one_file_allowed": "Je možné nahrať iba jeden súbor naraz.",
-    "file_size_limit": "Súbor musí byť menší ako {size}MB.",
     "drag_and_drop": "Pretiahnite súbor kamkoľvek pre nahratie",
-    "delete": "Zmazať prílohu"
+    "delete": "Zmazať prílohu",
+    "files_too_large": "Preskočené {count, plural, one {# súbor} few {# súbory} many {# súboru} other {# súborov}} nad limitom {size} MB: {files}",
+    "upload_success_title": "{count, plural, one {Príloha nahraná} few {Prílohy nahrané} many {Prílohy nahrané} other {Prílohy nahrané}}",
+    "upload_success": "{count, plural, one {Pridaný # súbor.} few {Pridané # súbory.} many {Pridaných # súboru.} other {Pridaných # súborov.}}",
+    "upload_failed_title": "{count, plural, one {Príloha nenahraná} few {Prílohy nenahrané} many {Prílohy nenahrané} other {Prílohy nenahrané}}",
+    "upload_partial_failure": "{count, plural, one {Pridaný # súbor.} few {Pridané # súbory.} many {Pridaných # súboru.} other {Pridaných # súborov.}} Nepodarilo sa pridať: {files}",
+    "upload_failure": "Nepodarilo sa pridať: {files}. Skúste to znova."
   },
   "label": {
     "select": "Vybrať štítok",
diff --git a/packages/i18n/src/locales/tr-TR/common.json b/packages/i18n/src/locales/tr-TR/common.json
index 74bd5cbf9b3..0582bd09873 100644
--- a/packages/i18n/src/locales/tr-TR/common.json
+++ b/packages/i18n/src/locales/tr-TR/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Dosya eklenemedi. Tekrar yüklemeyi deneyin.",
-    "only_one_file_allowed": "Aynı anda yalnızca bir dosya yüklenebilir.",
-    "file_size_limit": "Dosya boyutu {size}MB veya daha az olmalıdır.",
     "drag_and_drop": "Yüklemek için herhangi bir yere sürükleyip bırakın",
-    "delete": "Eki sil"
+    "delete": "Eki sil",
+    "files_too_large": "{size} MB sınırını aşan {count, plural, one {# dosya} other {# dosya}} atlandı: {files}",
+    "upload_success_title": "{count, plural, one {Ek yüklendi} other {Ekler yüklendi}}",
+    "upload_success": "{count, plural, one {# dosya eklendi.} other {# dosya eklendi.}}",
+    "upload_failed_title": "{count, plural, one {Ek yüklenmedi} other {Ekler yüklenmedi}}",
+    "upload_partial_failure": "{count, plural, one {# dosya eklendi.} other {# dosya eklendi.}} Eklenemedi: {files}",
+    "upload_failure": "Eklenemedi: {files}. Lütfen tekrar deneyin."
   },
   "label": {
     "select": "Etiket seç",
diff --git a/packages/i18n/src/locales/ua/common.json b/packages/i18n/src/locales/ua/common.json
index 89bd906d8fa..4b1807a85bc 100644
--- a/packages/i18n/src/locales/ua/common.json
+++ b/packages/i18n/src/locales/ua/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Не вдалося додати файл. Спробуйте ще раз.",
-    "only_one_file_allowed": "Можна завантажити лише один файл одночасно.",
-    "file_size_limit": "Файл має бути меншим за {size}МБ.",
     "drag_and_drop": "Перетягніть файл сюди для завантаження",
-    "delete": "Видалити вкладення"
+    "delete": "Видалити вкладення",
+    "files_too_large": "{count, plural, one {Пропущено # файл} few {Пропущено # файла} many {Пропущено # файлів} other {Пропущено # файла}} через перевищення ліміту {size} МБ: {files}",
+    "upload_success_title": "{count, plural, one {Вкладення завантажено} few {Вкладення завантажено} many {Вкладення завантажено} other {Вкладення завантажено}}",
+    "upload_success": "{count, plural, one {Прикріплено # файл.} few {Прикріплено # файла.} many {Прикріплено # файлів.} other {Прикріплено # файла.}}",
+    "upload_failed_title": "{count, plural, one {Вкладення не завантажено} few {Вкладення не завантажено} many {Вкладення не завантажено} other {Вкладення не завантажено}}",
+    "upload_partial_failure": "{count, plural, one {Прикріплено # файл.} few {Прикріплено # файла.} many {Прикріплено # файлів.} other {Прикріплено # файла.}} Не вдалося прикріпити: {files}",
+    "upload_failure": "Не вдалося прикріпити: {files}. Спробуйте ще раз."
   },
   "label": {
     "select": "Вибрати мітку",
diff --git a/packages/i18n/src/locales/vi-VN/common.json b/packages/i18n/src/locales/vi-VN/common.json
index f9aae43c1b9..90ffa8a7529 100644
--- a/packages/i18n/src/locales/vi-VN/common.json
+++ b/packages/i18n/src/locales/vi-VN/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "Không thể đính kèm tệp. Vui lòng tải lên lại.",
-    "only_one_file_allowed": "Chỉ có thể tải lên một tệp mỗi lần.",
-    "file_size_limit": "Kích thước tệp phải nhỏ hơn hoặc bằng {size}MB.",
     "drag_and_drop": "Kéo và thả vào bất kỳ đâu để tải lên",
-    "delete": "Xóa tệp đính kèm"
+    "delete": "Xóa tệp đính kèm",
+    "files_too_large": "Đã bỏ qua {count, plural, one {# tệp} other {# tệp}} vượt quá giới hạn {size} MB: {files}",
+    "upload_success_title": "{count, plural, one {Đã tải lên tệp đính kèm} other {Đã tải lên tệp đính kèm}}",
+    "upload_success": "{count, plural, one {Đã đính kèm # tệp.} other {Đã đính kèm # tệp.}}",
+    "upload_failed_title": "{count, plural, one {Chưa tải lên tệp đính kèm} other {Chưa tải lên tệp đính kèm}}",
+    "upload_partial_failure": "{count, plural, one {Đã đính kèm # tệp.} other {Đã đính kèm # tệp.}} Không thể đính kèm: {files}",
+    "upload_failure": "Không thể đính kèm: {files}. Vui lòng thử lại."
   },
   "label": {
     "select": "Chọn nhãn",
diff --git a/packages/i18n/src/locales/zh-CN/common.json b/packages/i18n/src/locales/zh-CN/common.json
index dd67d925a07..8863407559b 100644
--- a/packages/i18n/src/locales/zh-CN/common.json
+++ b/packages/i18n/src/locales/zh-CN/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "无法附加文件。请重新上传。",
-    "only_one_file_allowed": "一次只能上传一个文件。",
-    "file_size_limit": "文件大小必须小于或等于 {size}MB。",
     "drag_and_drop": "拖放到任意位置以上传",
-    "delete": "删除附件"
+    "delete": "删除附件",
+    "files_too_large": "已跳过超出 {size}MB 限制的 {count, plural, one {# 个文件} other {# 个文件}}：{files}",
+    "upload_success_title": "{count, plural, one {附件已上传} other {附件已上传}}",
+    "upload_success": "{count, plural, one {已附加 # 个文件。} other {已附加 # 个文件。}}",
+    "upload_failed_title": "{count, plural, one {附件未上传} other {附件未上传}}",
+    "upload_partial_failure": "{count, plural, one {已附加 # 个文件。} other {已附加 # 个文件。}}无法附加：{files}",
+    "upload_failure": "无法附加：{files}。请重试。"
   },
   "label": {
     "select": "选择标签",
diff --git a/packages/i18n/src/locales/zh-TW/common.json b/packages/i18n/src/locales/zh-TW/common.json
index 834a2d922d8..9f078a9da59 100644
--- a/packages/i18n/src/locales/zh-TW/common.json
+++ b/packages/i18n/src/locales/zh-TW/common.json
@@ -759,10 +759,14 @@
   },
   "attachment": {
     "error": "無法附加檔案。請重新上傳。",
-    "only_one_file_allowed": "一次只能上傳一個檔案。",
-    "file_size_limit": "檔案大小必須小於或等於 {size}MB。",
     "drag_and_drop": "拖曳到任何位置以上傳",
-    "delete": "刪除附件"
+    "delete": "刪除附件",
+    "files_too_large": "已略過超出 {size}MB 限制的 {count, plural, one {# 個檔案} other {# 個檔案}}：{files}",
+    "upload_success_title": "{count, plural, one {附件已上傳} other {附件已上傳}}",
+    "upload_success": "{count, plural, one {已附加 # 個檔案。} other {已附加 # 個檔案。}}",
+    "upload_failed_title": "{count, plural, one {附件未上傳} other {附件未上傳}}",
+    "upload_partial_failure": "{count, plural, one {已附加 # 個檔案。} other {已附加 # 個檔案。}}無法附加：{files}",
+    "upload_failure": "無法附加：{files}。請重試。"
   },
   "label": {
     "select": "選擇標籤",