diff --git a/package-lock.json b/package-lock.json
index 8de9406..9a1ca38 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "lms",
-  "version": "1.2.17",
+  "version": "1.2.18",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "lms",
-      "version": "1.2.17",
+      "version": "1.2.18",
       "dependencies": {
         "@electron-toolkit/preload": "^3.0.1",
         "@electron-toolkit/utils": "^4.0.0",
diff --git a/package.json b/package.json
index 92c01ce..42fb9d0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lms",
-  "version": "1.2.17",
+  "version": "1.2.18",
   "description": "Autonomy Studio LMS Electron app",
   "main": "./out/main/index.js",
   "author": {
diff --git a/scripts/test-agent-response-reveal.cjs b/scripts/test-agent-response-reveal.cjs
index 1ba1892..4d3d423 100644
--- a/scripts/test-agent-response-reveal.cjs
+++ b/scripts/test-agent-response-reveal.cjs
@@ -92,6 +92,15 @@ function renderResponse(message, now, reducedMotion = false, extra = {}) {
   return renderToStaticMarkup(ProgressiveChatResponse({ message, dark: true, children: React.createElement('button', null, '승인'), ...extra }))
 }
 
+test('managed agent responses display A-Copilot without an internal provider ID or duplicate model name', () => {
+  const html = renderResponse({ content: '분석 결과', provider: 'A_COPILOT', model: 'A-Copilot' }, 0)
+  assert.ok(html.includes('A-Copilot'))
+  assert.ok(!html.includes('A_COPILOT'))
+  assert.ok(!html.includes('A-Copilot · A-Copilot'))
+  assert.equal((html.match(/>A-Copilot<\/p>/g) ?? []).length, 1)
+  assert.ok(renderResponse({ content: '결과', provider: 'QWEN', model: 'qwen3.8-max' }, 0).includes('QWEN · qwen3.8-max'))
+})
+
 test('approval controls wait for the explanation; restored history does not replay', () => {
   const message = { role: 'assistant', revealStartedAt: 1000, plan: { summary: '조향 설명', explanation: content }, provider: 'QWEN', model: 'test' }
   const first = renderResponse(message, 1000)
diff --git a/scripts/test-i18n.cjs b/scripts/test-i18n.cjs
index f874258..49103da 100644
--- a/scripts/test-i18n.cjs
+++ b/scripts/test-i18n.cjs
@@ -9,6 +9,39 @@ const { createInstance } = require('i18next')
 const root = path.resolve(__dirname, '../src/renderer/src')
 const dictionary = JSON.parse(fs.readFileSync(path.join(root, 'i18n/en.json'), 'utf8'))
 
+test('only the default simulation description follows language; vehicle and custom text stay unchanged', () => {
+  const { api } = setup('ko')
+  const exports = {}
+  const source = fs.readFileSync(path.join(root, 'features/platforms/PlatformCards.tsx'), 'utf8')
+  const code = ts.transpileModule(source, { compilerOptions: {
+    module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2022,
+    jsx: ts.JsxEmit.ReactJSX, esModuleInterop: true
+  } }).outputText
+  vm.runInNewContext(code, { exports, require: name => name === '../../i18n'
+    ? { ...api, useLocaleRender() {} } : require(name) })
+  const { createElement } = require('react')
+  const { renderToStaticMarkup } = require('react-dom/server')
+  const description = '내 PC에서 직접 개발 환경을 실행합니다.'
+  const platform = { id: 'local', platformKey: 'futuredrive-local-pc', title: '로컬 PC', description, state: 'ready' }
+  const render = value => renderToStaticMarkup(createElement(exports.PlatformOptionCard, {
+    platform: value, Icon: () => null, dotClassName: '', unavailable: false,
+    statusPending: false, displayStatus: '사용 가능', primaryAction: '연결',
+    actionDisabled: false, running: false, onAction() {}, onSettings() {}
+  }))
+  assert.ok(render(platform).includes(description))
+  api.setLanguage('en')
+  assert.ok(render(platform).includes('Run the development environment directly on this PC.'))
+  assert.ok(!render(platform).includes(description))
+  const vehicleDescription = '기초 SLAM 및 자율주행 실습 장비입니다.'
+  assert.ok(render({ ...platform, platformKey: 'mk-mini', description: vehicleDescription }).includes(vehicleDescription))
+  assert.ok(render({ ...platform, platformKey: 'mk-mini' }).includes(description))
+  assert.ok(render({ ...platform, description: '강사가 작성한 시뮬레이션 안내' }).includes('강사가 작성한 시뮬레이션 안내'))
+  assert.ok(render({ ...platform, description: '설정' }).includes('>설정</p>'))
+  api.setLanguage('ko')
+  assert.ok(render(platform).includes(description))
+  assert.equal(platform.description, description)
+})
+
 test('close studio modal translates the built-in Local PC title but preserves vehicle names', () => {
   const source = fs.readFileSync(path.join(root, 'App.tsx'), 'utf8')
   const expression = source.match(/platformTitle=\{(runningPlatformCloseTarget\.platformKey[^\n]+)\}/)?.[1]
diff --git a/src/renderer/src/components/ProgressiveChatResponse.tsx b/src/renderer/src/components/ProgressiveChatResponse.tsx
index 629052c..5197b96 100644
--- a/src/renderer/src/components/ProgressiveChatResponse.tsx
+++ b/src/renderer/src/components/ProgressiveChatResponse.tsx
@@ -21,7 +21,7 @@ export function ProgressiveChatResponse({ message, dark, children, footerAction,
   defaultCollapsed?: boolean
 }): React.JSX.Element {
   const content = message.plan?.explanation ?? message.content
-  const modelLabel = [message.provider, message.model].filter(Boolean).join(' · ')
+  const modelLabel = message.provider === 'A_COPILOT' ? 'A-Copilot' : [message.provider, message.model].filter(Boolean).join(' · ')
   const document = useMemo(() => createAgentRevealDocument(content), [content])
   const [now, setNow] = useState(Date.now)
   const [reducedMotion, setReducedMotion] = useState(() => typeof window !== 'undefined' && window.matchMedia('(prefers-reduced-motion: reduce)').matches)
diff --git a/src/renderer/src/features/platforms/PlatformCards.tsx b/src/renderer/src/features/platforms/PlatformCards.tsx
index d913921..674a665 100644
--- a/src/renderer/src/features/platforms/PlatformCards.tsx
+++ b/src/renderer/src/features/platforms/PlatformCards.tsx
@@ -105,7 +105,11 @@ export function PlatformOptionCard({
         <div className="flex items-center gap-2">
           <h3 className="truncate text-[15px] font-bold text-[#111520]">{platform.platformKey === 'futuredrive-local-pc' ? t('시뮬레이션') : platform.title}</h3>
         </div>
-        <p className="mt-1 text-[12px] font-medium text-[#5f6878]">{platform.description}</p>
+        <p className="mt-1 text-[12px] font-medium text-[#5f6878]">
+          {platform.platformKey === 'futuredrive-local-pc' && platform.description === '내 PC에서 직접 개발 환경을 실행합니다.'
+            ? t('내 PC에서 직접 개발 환경을 실행합니다.')
+            : platform.description}
+        </p>
         <div className="mt-2 flex items-center gap-1.5 text-[11px] font-bold text-[#5f6878]">
           {statusPending
             ? <LoaderCircle size={13} className="animate-spin text-[#7a879a]" />
diff --git a/src/renderer/src/i18n/en.json b/src/renderer/src/i18n/en.json
index 8916a98..4038f6b 100644
--- a/src/renderer/src/i18n/en.json
+++ b/src/renderer/src/i18n/en.json
@@ -718,5 +718,6 @@
   "조회 실패": "Retrieval failed",
   "일부 결과": "Partial results",
   "SLAM 실습 준비": "Prepare SLAM practice",
-  "승인하고 준비": "Approve and prepare"
+  "승인하고 준비": "Approve and prepare",
+  "내 PC에서 직접 개발 환경을 실행합니다.": "Run the development environment directly on this PC."
 }