diff --git a/app/shared/src/ui/DocxPreview.tsx b/app/shared/src/ui/DocxPreview.tsx
index 14a03a419..965910db1 100644
--- a/app/shared/src/ui/DocxPreview.tsx
+++ b/app/shared/src/ui/DocxPreview.tsx
@@ -101,7 +101,7 @@ export const DocxPreview: React.FC<DocxPreviewProps> = ({
           <span className={styles.badge}>DOCX</span>
         </div>
         {onClose && (
-          <Tooltip label="关闭预览">
+          <Tooltip label={t("aria.closePreview")}>
             <Button
               variant="ghost"
               size="sm"
diff --git a/app/shared/src/ui/SlideshowPreview.tsx b/app/shared/src/ui/SlideshowPreview.tsx
index b786cc272..6759f98d1 100644
--- a/app/shared/src/ui/SlideshowPreview.tsx
+++ b/app/shared/src/ui/SlideshowPreview.tsx
@@ -239,7 +239,7 @@ export const SlideshowPreview: React.FC<SlideshowPreviewProps> = ({
           {totalSlides > 0 ? `${currentSlide + 1} / ${totalSlides}` : '—'}
         </span>
         {onClose && (
-          <Tooltip label="关闭预览">
+          <Tooltip label={t("aria.closePreview")}>
             <Button
               variant="ghost"
               size="sm"
@@ -276,7 +276,7 @@ export const SlideshowPreview: React.FC<SlideshowPreviewProps> = ({
       {/* ── Slide view ── */}
       {!loading && !error && currentSlideData && (
         <div className={styles.slideArea}>
-          <Tooltip label="上一张">
+          <Tooltip label={t("aria.previousImage")}>
             <button
               className={styles.navBtn}
               onClick={prevSlide}
@@ -306,7 +306,7 @@ export const SlideshowPreview: React.FC<SlideshowPreviewProps> = ({
             </div>
           </div>
 
-          <Tooltip label="下一张">
+          <Tooltip label={t("aria.nextImage")}>
             <button type="button"
               className={styles.navBtn}
               onClick={nextSlide}
diff --git a/app/shared/src/ui/TablePreview.tsx b/app/shared/src/ui/TablePreview.tsx
index 48197c183..a619af16c 100644
--- a/app/shared/src/ui/TablePreview.tsx
+++ b/app/shared/src/ui/TablePreview.tsx
@@ -242,7 +242,7 @@ export const TablePreview: React.FC<TablePreviewProps> = ({
           <span className={styles.badge}>{fileExt}</span>
         </div>
         {onClose && (
-          <Tooltip label="关闭预览">
+          <Tooltip label={t("aria.closePreview")}>
             <Button
               variant="ghost"
               size="sm"
diff --git a/app/shared/src/workbench/ConversationSidebar.tsx b/app/shared/src/workbench/ConversationSidebar.tsx
index 04cdc1b58..87758f4f6 100644
--- a/app/shared/src/workbench/ConversationSidebar.tsx
+++ b/app/shared/src/workbench/ConversationSidebar.tsx
@@ -544,7 +544,7 @@ export function ConversationSidebar({
                           </Tooltip>
                         )}
                         {onArchiveConversation && !showArchived && (
-                          <Tooltip label="归档">
+                          <Tooltip label={t("aria.archive")}>
                             <button type="button"
                               aria-label={t('aria.archive')}
                               className={styles.conversationActionBtn}
@@ -560,7 +560,7 @@ export function ConversationSidebar({
                           </Tooltip>
                         )}
                         {onArchiveConversation && showArchived && (
-                          <Tooltip label="取消归档">
+                          <Tooltip label={t("aria.unarchive")}>
                             <button type="button"
                               aria-label={t('aria.unarchive')}
                               className={styles.conversationActionBtn}
diff --git a/app/shared/src/workbench/WorkspaceHeader.tsx b/app/shared/src/workbench/WorkspaceHeader.tsx
index a52e2d847..32854c640 100644
--- a/app/shared/src/workbench/WorkspaceHeader.tsx
+++ b/app/shared/src/workbench/WorkspaceHeader.tsx
@@ -95,7 +95,7 @@ export function WorkspaceHeader({
       </div>
 
       <div className={styles.workspaceActions}>
-        <Tooltip label="搜索">
+        <Tooltip label={t('aria.search')}>
           <button
             aria-label={t('aria.search')}
             className={styles.iconButton}
@@ -105,7 +105,7 @@ export function WorkspaceHeader({
             <DesignNavIcon name="search" />
           </button>
         </Tooltip>
-        <Tooltip label="新任务">
+        <Tooltip label={t('aria.newTask')}>
           <button
             aria-label={t('aria.newTask')}
             className={styles.iconButton}
@@ -114,7 +114,7 @@ export function WorkspaceHeader({
             <DesignNavIcon name="template" />
           </button>
         </Tooltip>
-        <Tooltip label="确认项">
+        <Tooltip label={t('aria.confirmItems')}>
           <button
             aria-label={t('aria.confirmItems')}
             className={styles.iconButton}
@@ -123,7 +123,7 @@ export function WorkspaceHeader({
             <DesignNavIcon name="check" />
           </button>
         </Tooltip>
-        <Tooltip label="会话设置">
+        <Tooltip label={t('aria.sessionSettings')}>
           <button
             aria-label={t('aria.sessionSettings')}
             className={styles.iconButton}