diff --git a/docs/storybook-inventory.md b/docs/storybook-inventory.md
index deb96ae77..a98d45225 100644
--- a/docs/storybook-inventory.md
+++ b/docs/storybook-inventory.md
@@ -21,7 +21,8 @@ operator-facing control you can click before changing product CSS.
 | `Workspace/WorkspaceCalendar` | Read observed Naruon events, or open a commitment to land on that post. Fail-closed copy stays `이 범위의 일정을 아직 받을 수 없습니다`. | `--color-chip-border`, `WorkspaceCalendar`, `EvidenceStatusMark` |
 | `Evidence/OntologyExplorer` | Distinguish Post, Person, Organization, and Team by shape and text, use the token-backed surface as a secondary cue, then open the exact-value table or cited evidence. Compare desktop, narrow, drawer, empty, truncated, denied, stale, and rejected states. | `--ontology-node-*-fill`, `OntologyExplorer` |
 | `Post/ProductEvidenceList` | Open the cited product span. If the identity is unresolved, review the product catalog before using the relationship. Compare catalog-linked and catalog-review-required states. | `--surface`, `--border`, `ProductEvidenceList` |
-| `Dashboard/VoiceTaxonomySummary` | Compare source and semantic classifications, note overlapping memberships, then review disagreements and records waiting for evidence. | `--surface`, `--border`, `VoiceTaxonomySummary` |
+| `Dashboard/VoiceTaxonomySummary` | Compare source and semantic classifications, note overlapping memberships, then review disagreements and records waiting for evidence; `KoreanMobile` verifies locale-complete customer copy in the narrow viewport. | `--surface`, `--border`, `VoiceTaxonomySummary` |
+| `Navigation/WorkspaceNav` | Reach every workspace destination and the language action; `MobileAllDestinations` keeps all actions visible without horizontal clipping. | `--gnb-height`, `--size-control-min`, `WorkspaceNav` |
 
 Repeated web objects must use `frontend/src/styles/tokens.css` and a module
 under `frontend/src/components/`. Do not add a second Node package manager;
diff --git a/frontend/src/App.css b/frontend/src/App.css
index 11409d336..50a5d782d 100644
--- a/frontend/src/App.css
+++ b/frontend/src/App.css
@@ -1344,16 +1344,25 @@
   /* Phone Breakpoint (<768px) */
 
   .workspace-gnb {
-    overflow-x: auto;
-    overscroll-behavior-inline: contain;
-    gap: 0.75rem;
+    display: grid;
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+    height: auto;
+    gap: 0;
     padding: 0 1rem;
-    scrollbar-width: thin;
   }
 
-  .workspace-gnb-item,
+  .workspace-gnb-item {
+    min-height: var(--size-control-min);
+    justify-content: center;
+    padding: 0 0.25rem;
+    text-align: center;
+  }
+
   .workspace-gnb-tools {
-    flex: 0 0 auto;
+    grid-column: 1 / -1;
+    min-height: var(--size-control-min);
+    margin-left: 0;
+    justify-content: flex-end;
   }
 
   .mobile-drawer-trigger {
diff --git a/frontend/src/components/VoiceTaxonomySummary.stories.tsx b/frontend/src/components/VoiceTaxonomySummary.stories.tsx
index 8665a6f6b..38821bd59 100644
--- a/frontend/src/components/VoiceTaxonomySummary.stories.tsx
+++ b/frontend/src/components/VoiceTaxonomySummary.stories.tsx
@@ -1,4 +1,5 @@
 import type { Meta, StoryObj } from "@storybook/react";
+import { setLocale } from "../i18n";
 import { VoiceTaxonomySummary } from "./VoiceTaxonomySummary";
 
 const meta = { title: "Dashboard/VoiceTaxonomySummary", component: VoiceTaxonomySummary } satisfies Meta<typeof VoiceTaxonomySummary>;
@@ -14,3 +15,12 @@ export const OverlappingEvidence: Story = { args: { data: {
     { voice_concept_code: "vom", post_count: 4, eligible_percentage: 33.3 },
   ],
 } } };
+
+export const KoreanMobile: Story = {
+  ...OverlappingEvidence,
+  beforeEach: () => {
+    setLocale("ko");
+    return () => setLocale("en");
+  },
+  globals: { viewport: { value: "mobile1", isRotated: false } },
+};
diff --git a/frontend/src/components/VoiceTaxonomySummary.test.tsx b/frontend/src/components/VoiceTaxonomySummary.test.tsx
index e46a3925b..9e177bd2d 100644
--- a/frontend/src/components/VoiceTaxonomySummary.test.tsx
+++ b/frontend/src/components/VoiceTaxonomySummary.test.tsx
@@ -1,8 +1,11 @@
-import { render, screen } from "@testing-library/react";
-import { describe, expect, it } from "vitest";
+import { act, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it } from "vitest";
+import { setLocale } from "../i18n";
 import { VoiceTaxonomySummary } from "./VoiceTaxonomySummary";
 
 describe("VoiceTaxonomySummary", () => {
+  afterEach(() => setLocale("en"));
+
   it("discloses overlapping counts and the next review action", () => {
     render(<VoiceTaxonomySummary data={{
       total_eligible: 2, classified_unique: 0, multi_membership: 1,
@@ -16,4 +19,22 @@ describe("VoiceTaxonomySummary", () => {
     expect(screen.getByText(/voice categories, so category counts can overlap/)).toBeInTheDocument();
     expect(screen.getByText(/Review disagreements and records without voice evidence/)).toBeInTheDocument();
   });
+
+  it("updates every visible label when the product locale changes", () => {
+    render(<VoiceTaxonomySummary data={{
+      total_eligible: 2, classified_unique: 2, multi_membership: 0,
+      source_count: 2, derived_count: 0, unavailable: 0, disagreement: 0,
+      counts_overlap: false,
+      category_memberships: [{ voice_concept_code: "voc", post_count: 2, eligible_percentage: 100 }],
+    }} />);
+
+    act(() => setLocale("ko"));
+
+    expect(screen.getByRole("heading", { name: "글 유형 근거 현황" })).toBeInTheDocument();
+    expect(screen.getByText("기록된 근거")).toBeInTheDocument();
+    expect(screen.getByText("글 유형 근거가 없는 기록")).toBeInTheDocument();
+    expect(screen.getByText("고객의 소리")).toBeInTheDocument();
+    expect(screen.getByText(/불일치와 글 유형 근거가 없는 기록을 확인한 뒤/)).toBeInTheDocument();
+    expect(screen.queryByText("Voice evidence overview")).not.toBeInTheDocument();
+  });
 });
diff --git a/frontend/src/components/VoiceTaxonomySummary.tsx b/frontend/src/components/VoiceTaxonomySummary.tsx
index adb067bad..d74cff0fa 100644
--- a/frontend/src/components/VoiceTaxonomySummary.tsx
+++ b/frontend/src/components/VoiceTaxonomySummary.tsx
@@ -1,5 +1,5 @@
 import type { VoiceTaxonomySummary as Summary } from "../api";
-import { t, tf } from "../i18n";
+import { t, tf, useLocale } from "../i18n";
 
 const voiceLabels = {
   voc: "Voice of Customer",
@@ -10,6 +10,7 @@ const voiceLabels = {
 } as const;
 
 export function VoiceTaxonomySummary({ data }: { data: Summary }) {
+  useLocale();
   return (
     <section className="operations-dashboard" aria-labelledby="voice-summary-heading">
       <h2 id="voice-summary-heading">{t("Voice evidence overview")}</h2>
diff --git a/frontend/src/components/WorkspaceNav.stories.tsx b/frontend/src/components/WorkspaceNav.stories.tsx
index a958b67af..b4b33ee54 100644
--- a/frontend/src/components/WorkspaceNav.stories.tsx
+++ b/frontend/src/components/WorkspaceNav.stories.tsx
@@ -34,3 +34,11 @@ export const WithTools: Story = {
     tools: <button type="button">Sign out</button>,
   },
 };
+
+export const MobileAllDestinations: Story = {
+  args: {
+    destination: "dashboard",
+    tools: <button type="button">언어</button>,
+  },
+  globals: { viewport: { value: "mobile1", isRotated: false } },
+};
diff --git a/frontend/src/mobileNavigationCss.test.ts b/frontend/src/mobileNavigationCss.test.ts
index bd2a37f52..c19848d3e 100644
--- a/frontend/src/mobileNavigationCss.test.ts
+++ b/frontend/src/mobileNavigationCss.test.ts
@@ -8,6 +8,10 @@ const css = readFileSync(join(dirname(fileURLToPath(import.meta.url)), "App.css"
 it("keeps the workspace GNB reachable on mobile", () => {
   const mobile = css.match(/@media \(max-width: 768px\) \{([\s\S]*?)\n\}/)?.[1] ?? "";
   expect(mobile).toContain(".workspace-gnb");
-  expect(mobile).toContain("overflow-x: auto");
+  expect(mobile).toContain("grid-template-columns: repeat(3, minmax(0, 1fr))");
+  expect(mobile).toContain("height: auto");
+  expect(mobile).toContain("grid-column: 1 / -1");
+  expect(mobile).toContain("min-height: var(--size-control-min)");
+  expect(mobile).not.toContain("overflow-x: auto");
   expect(mobile).not.toContain(".workspace-gnb {\n    display: none");
 });