diff --git a/.github/scripts/frontend-bundle-diagnostics.render-md.mts b/.github/scripts/frontend-bundle-diagnostics.render-md.mts
index 7ec0cfc61d..1e8cf37f24 100644
--- a/.github/scripts/frontend-bundle-diagnostics.render-md.mts
+++ b/.github/scripts/frontend-bundle-diagnostics.render-md.mts
@@ -9,7 +9,7 @@ import * as util from './utility.mts';
 
 const marker = '<!-- misskey-frontend-bundle-diagnostics -->';
 
-const locale = process.env.FRONTEND_JS_SIZE_LOCALE ?? 'ja-JP';
+const locale = 'ja-JP';
 
 //function sharePercent(value, total) {
 //	if (total === 0) return '0%';
diff --git a/.github/workflows/frontend-bundle-diagnostics.inspect.yml b/.github/workflows/frontend-bundle-diagnostics.inspect.yml
index 3572f77ea8..6aa4f54fb4 100644
--- a/.github/workflows/frontend-bundle-diagnostics.inspect.yml
+++ b/.github/workflows/frontend-bundle-diagnostics.inspect.yml
@@ -37,8 +37,6 @@ jobs:
   report:
     name: Build frontend bundle report
     runs-on: ubuntu-latest
-    env:
-      FRONTEND_JS_SIZE_LOCALE: ja-JP
     steps:
       - name: Checkout base
         uses: actions/checkout@v6.0.3
@@ -56,25 +54,12 @@ jobs:
           path: after
           submodules: true
 
-      - name: Check base visualizer support
-        id: check-base-visualizer
-        shell: bash
-        run: |
-          if grep -q 'FRONTEND_BUNDLE_VISUALIZER' before/packages/frontend/vite.config.ts; then
-            echo 'supported=true' >> "$GITHUB_OUTPUT"
-          else
-            echo 'supported=false' >> "$GITHUB_OUTPUT"
-            echo 'Base commit does not support frontend bundle visualizer. Skipping frontend bundle report.' >> "$GITHUB_STEP_SUMMARY"
-          fi
-
       - name: Setup pnpm
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         uses: pnpm/action-setup@v6.0.9
         with:
           package_json_file: after/package.json
 
       - name: Setup Node.js
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         uses: actions/setup-node@v6.4.0
         with:
           node-version-file: after/.node-version
@@ -84,21 +69,17 @@ jobs:
             after/pnpm-lock.yaml
 
       - name: Install dependencies for base
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         working-directory: before
         run: pnpm i --frozen-lockfile
 
       - name: Build frontend dependencies for base
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         working-directory: before
         run: pnpm --filter "frontend^..." run build
 
       - name: Prepare report output
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         run: mkdir -p "$RUNNER_TEMP/frontend-bundle-report"
 
       - name: Build frontend report for base
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         working-directory: before
         env:
           FRONTEND_BUNDLE_VISUALIZER: 'true'
@@ -106,17 +87,14 @@ jobs:
         run: pnpm --filter frontend run build
 
       - name: Install dependencies for pull request
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         working-directory: after
         run: pnpm i --frozen-lockfile
 
       - name: Build frontend dependencies for pull request
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         working-directory: after
         run: pnpm --filter "frontend^..." run build
 
       - name: Build frontend report for pull request
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         working-directory: after
         env:
           FRONTEND_BUNDLE_VISUALIZER: 'true'
@@ -125,7 +103,6 @@ jobs:
         run: pnpm --filter frontend run build
 
       - name: Upload bundle visualizer
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         id: upload-bundle-visualizer
         uses: actions/upload-artifact@v7
         with:
@@ -136,7 +113,6 @@ jobs:
           retention-days: 7
 
       - name: Generate report markdown
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         shell: bash
         env:
           BASE_SHA: ${{ github.event.pull_request.base.sha }}
@@ -152,7 +128,6 @@ jobs:
           printf '%s\n' "${{ github.event.pull_request.html_url }}" > "$REPORT_DIR/pr-url.txt"
 
       - name: Check report
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         run: |
           REPORT_DIR="$RUNNER_TEMP/frontend-bundle-report"
           test -s "$REPORT_DIR/before-stats.json"
@@ -161,7 +136,6 @@ jobs:
           cat "$REPORT_DIR/frontend-bundle-diagnostics-report.md" >> "$GITHUB_STEP_SUMMARY"
 
       - name: Upload bundle report
-        if: steps.check-base-visualizer.outputs.supported == 'true'
         uses: actions/upload-artifact@v7
         with:
           name: frontend-bundle-report