diff --git a/apps/desktop/electron.vite.config.ts b/apps/desktop/electron.vite.config.ts
index 89969bd..5b379b7 100644
--- a/apps/desktop/electron.vite.config.ts
+++ b/apps/desktop/electron.vite.config.ts
@@ -4,10 +4,11 @@ import react from '@vitejs/plugin-react'
 
 const sharedAlias = {
   '@d3ro/core': resolve(__dirname, '../../packages/core/src'),
-  '@d3ro/ui': resolve(__dirname, '../../packages/ui/src')
+  '@d3ro/ui': resolve(__dirname, '../../packages/ui/src'),
+  '@d3ro/i18n': resolve(__dirname, '../../packages/i18n/src/index.tsx')
 }
 
-const workspaceExclude = ['@d3ro/core', '@d3ro/ui']
+const workspaceExclude = ['@d3ro/core', '@d3ro/ui', '@d3ro/i18n']
 
 export default defineConfig({
   main: {
diff --git a/apps/desktop/package.json b/apps/desktop/package.json
index e1113a1..6ac61ac 100644
--- a/apps/desktop/package.json
+++ b/apps/desktop/package.json
@@ -41,6 +41,7 @@
   },
   "dependencies": {
     "@d3ro/core": "*",
+    "@d3ro/i18n": "*",
     "@d3ro/ui": "*",
     "@electron-toolkit/preload": "^3.0.2",
     "@electron-toolkit/utils": "^4.0.0",
diff --git a/apps/desktop/src/renderer/App.tsx b/apps/desktop/src/renderer/App.tsx
index 339dbdf..662cadf 100644
--- a/apps/desktop/src/renderer/App.tsx
+++ b/apps/desktop/src/renderer/App.tsx
@@ -5,12 +5,23 @@
 import { useState, useEffect, useMemo, useRef } from 'react'
 import { ThemeProvider, CssBaseline, useMediaQuery } from '@mui/material'
 import { getTheme } from '@d3ro/ui/theme'
-import { I18nProvider } from './i18n'
+import { I18nProvider, type I18nStorage, type Locale } from '@d3ro/i18n'
 import { AppLayout } from './components/AppLayout'
 import { UpgradePromptModal } from './components/UpgradePromptModal'
 import { startSystemAudioCapture, stopSystemAudioCapture } from './utils/systemAudioCapture'
 import type { ThemeMode, ConfigChangedEvent } from '@d3ro/core/types'
 
+// Electron ConfigService에 바인딩된 i18n 영속화 어댑터
+const electronI18nStorage: I18nStorage = {
+  load: async () => {
+    const result = await window.electronAPI.config.get({ key: 'language' })
+    return result.success && result.data ? (result.data as string) : null
+  },
+  save: (locale: Locale) => {
+    window.electronAPI.config.set({ key: 'language', value: locale })
+  }
+}
+
 export function App(): React.ReactElement {
   const [themeMode, setThemeMode] = useState<ThemeMode>('auto')
   const prefersDark = useMediaQuery('(prefers-color-scheme: dark)')
@@ -60,7 +71,7 @@ export function App(): React.ReactElement {
   const theme = useMemo(() => getTheme(themeMode, prefersDark), [themeMode, prefersDark])
 
   return (
-    <I18nProvider>
+    <I18nProvider storage={electronI18nStorage}>
       <ThemeProvider theme={theme}>
         <CssBaseline />
         <AppLayout />
diff --git a/apps/desktop/src/renderer/components/AppLayout.tsx b/apps/desktop/src/renderer/components/AppLayout.tsx
index 13ce02f..e91bc34 100644
--- a/apps/desktop/src/renderer/components/AppLayout.tsx
+++ b/apps/desktop/src/renderer/components/AppLayout.tsx
@@ -24,8 +24,8 @@ import { LicenseModal } from './LicenseModal'
 import { OnboardingModal } from './OnboardingModal'
 import { StatusBar } from './StatusBar'
 import { d3roPalette, d3roFontMono, d3roTypo, d3roShadow, d3roRadius } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
-import type { TranslationKey } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
+import type { TranslationKey } from '@d3ro/i18n'
 import type { LicenseTier } from '@d3ro/core/types'
 
 type Route = 'dashboard' | 'history' | 'dictionary' | 'commands' | 'conversation' | 'knowledge' | 'meeting'
diff --git a/apps/desktop/src/renderer/components/FileDropZone.tsx b/apps/desktop/src/renderer/components/FileDropZone.tsx
index 2f2ed7c..4a615dc 100644
--- a/apps/desktop/src/renderer/components/FileDropZone.tsx
+++ b/apps/desktop/src/renderer/components/FileDropZone.tsx
@@ -8,7 +8,7 @@ import CloseIcon from '@mui/icons-material/Close'
 import UploadFileIcon from '@mui/icons-material/UploadFile'
 import { MetalCard, PhosphorText, Led } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roTypo } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type {
   FileTranscriptionProgress,
   FileTranscriptionResult,
diff --git a/apps/desktop/src/renderer/components/HotkeyRecordModal.tsx b/apps/desktop/src/renderer/components/HotkeyRecordModal.tsx
index 690f036..9cd769d 100644
--- a/apps/desktop/src/renderer/components/HotkeyRecordModal.tsx
+++ b/apps/desktop/src/renderer/components/HotkeyRecordModal.tsx
@@ -16,7 +16,7 @@ import {
   Typography,
 } from '@mui/material'
 import { d3roPalette } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { HotkeyBinding } from '@d3ro/core/types'
 
 // ── 키 이름 매핑 (Windows) ──────────────────────────────
diff --git a/apps/desktop/src/renderer/components/LicenseModal.tsx b/apps/desktop/src/renderer/components/LicenseModal.tsx
index 773596a..5ec0678 100644
--- a/apps/desktop/src/renderer/components/LicenseModal.tsx
+++ b/apps/desktop/src/renderer/components/LicenseModal.tsx
@@ -23,7 +23,7 @@ import CheckCircleIcon from '@mui/icons-material/CheckCircle'
 import CancelIcon from '@mui/icons-material/Cancel'
 import { MetalCard, PhosphorText, Led, ScreenPanel, PhysicalButton } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roFontMono, d3roTypo, d3roRadius, d3roShadow } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { LicenseInfo, LicenseTier, TierComparison, UsageQuota } from '@d3ro/core/types'
 
 interface LicenseModalProps {
diff --git a/apps/desktop/src/renderer/components/LicenseTab.tsx b/apps/desktop/src/renderer/components/LicenseTab.tsx
index 8b9d06b..498a2fb 100644
--- a/apps/desktop/src/renderer/components/LicenseTab.tsx
+++ b/apps/desktop/src/renderer/components/LicenseTab.tsx
@@ -13,7 +13,7 @@ import {
 import CheckCircleIcon from '@mui/icons-material/CheckCircle'
 import CancelIcon from '@mui/icons-material/Cancel'
 import { d3roPalette, d3roFontMono, d3roTypo, d3roRadius } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type {
   LicenseInfo,
   LicenseTier,
diff --git a/apps/desktop/src/renderer/components/OllamaGuideModal.tsx b/apps/desktop/src/renderer/components/OllamaGuideModal.tsx
index e3b6b74..6abda15 100644
--- a/apps/desktop/src/renderer/components/OllamaGuideModal.tsx
+++ b/apps/desktop/src/renderer/components/OllamaGuideModal.tsx
@@ -17,7 +17,7 @@ import OpenInNewIcon from '@mui/icons-material/OpenInNew'
 import ContentCopyIcon from '@mui/icons-material/ContentCopy'
 import { d3roPalette, d3roFontMono, d3roShadow } from '@d3ro/ui/theme'
 import { Led } from '@d3ro/ui/components/ds'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 
 interface OllamaGuideModalProps {
   open: boolean
diff --git a/apps/desktop/src/renderer/components/OnboardingModal.tsx b/apps/desktop/src/renderer/components/OnboardingModal.tsx
index ead7090..4ebc14d 100644
--- a/apps/desktop/src/renderer/components/OnboardingModal.tsx
+++ b/apps/desktop/src/renderer/components/OnboardingModal.tsx
@@ -18,7 +18,7 @@ import OpenInNewIcon from '@mui/icons-material/OpenInNew'
 import { d3roPalette, d3roFontMono, d3roShadow } from '@d3ro/ui/theme'
 import { Led } from '@d3ro/ui/components/ds'
 import { HotkeyRecordModal } from './HotkeyRecordModal'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { HotkeyBinding, AudioDevice } from '@d3ro/core/types'
 
 interface OnboardingModalProps {
diff --git a/apps/desktop/src/renderer/components/ProBadge.tsx b/apps/desktop/src/renderer/components/ProBadge.tsx
index 91c4d7a..335f0d6 100644
--- a/apps/desktop/src/renderer/components/ProBadge.tsx
+++ b/apps/desktop/src/renderer/components/ProBadge.tsx
@@ -6,7 +6,7 @@ import { Box, Typography } from '@mui/material'
 import LockIcon from '@mui/icons-material/Lock'
 import { d3roPalette, d3roFontMono, d3roTypo, d3roRadius } from '@d3ro/ui/theme'
 import { useProFeature } from '../hooks/useProFeature'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { Feature } from '@d3ro/core/types'
 
 interface ProBadgeProps {
diff --git a/apps/desktop/src/renderer/components/SettingsModal.tsx b/apps/desktop/src/renderer/components/SettingsModal.tsx
index 75bb321..31336fc 100644
--- a/apps/desktop/src/renderer/components/SettingsModal.tsx
+++ b/apps/desktop/src/renderer/components/SettingsModal.tsx
@@ -34,8 +34,8 @@ import CancelIcon from '@mui/icons-material/Cancel'
 import { d3roPalette, d3roFontMono, d3roShadow } from '@d3ro/ui/theme'
 import { HotkeyRecordModal } from './HotkeyRecordModal'
 import { LicenseTab } from './LicenseTab'
-import { useI18n, LOCALE_META } from '../i18n'
-import type { Locale } from '../i18n'
+import { useI18n, LOCALE_META } from '@d3ro/i18n'
+import type { Locale } from '@d3ro/i18n'
 import type { ThemeMode, AppConfig, HotkeyBinding, AudioDevice } from '@d3ro/core/types'
 import { Feature } from '@d3ro/core/types'
 
diff --git a/apps/desktop/src/renderer/components/StatusBar.tsx b/apps/desktop/src/renderer/components/StatusBar.tsx
index 8b6e99b..1d33995 100644
--- a/apps/desktop/src/renderer/components/StatusBar.tsx
+++ b/apps/desktop/src/renderer/components/StatusBar.tsx
@@ -8,7 +8,7 @@ import CloseIcon from '@mui/icons-material/Close'
 import { Led } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roFontMono, d3roTypo, d3roShadow, d3roRadius } from '@d3ro/ui/theme'
 import { OllamaGuideModal } from './OllamaGuideModal'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { LLMStatus } from '@d3ro/core/types'
 
 export function StatusBar(): React.ReactElement {
diff --git a/apps/desktop/src/renderer/components/TemplateSection.tsx b/apps/desktop/src/renderer/components/TemplateSection.tsx
index bf07789..bfefd01 100644
--- a/apps/desktop/src/renderer/components/TemplateSection.tsx
+++ b/apps/desktop/src/renderer/components/TemplateSection.tsx
@@ -10,7 +10,7 @@ import PlayArrowIcon from '@mui/icons-material/PlayArrow'
 import { MetalCard, PhosphorText, Led, PhysicalButton } from '@d3ro/ui/components/ds'
 import { PageHeader, EmptyStateCard } from './shared'
 import { d3roPalette, d3roFontMono, d3roTypo, d3roRadius } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { DictationTemplate, TemplateField, TemplateSessionInfo } from '@d3ro/core/types'
 
 export function TemplateSection(): React.ReactElement {
diff --git a/apps/desktop/src/renderer/components/UpgradePromptModal.tsx b/apps/desktop/src/renderer/components/UpgradePromptModal.tsx
index b53975b..16e5c2d 100644
--- a/apps/desktop/src/renderer/components/UpgradePromptModal.tsx
+++ b/apps/desktop/src/renderer/components/UpgradePromptModal.tsx
@@ -15,7 +15,7 @@ import {
 import LockIcon from '@mui/icons-material/Lock'
 import CheckCircleOutlineIcon from '@mui/icons-material/CheckCircleOutline'
 import { d3roPalette, d3roFontMono, d3roTypo, d3roRadius, d3roShadow } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { UpgradePromptEvent, UsageQuota } from '@d3ro/core/types'
 
 export function UpgradePromptModal(): React.ReactElement {
diff --git a/apps/desktop/src/renderer/components/meeting/AddDocumentDialog.tsx b/apps/desktop/src/renderer/components/meeting/AddDocumentDialog.tsx
index 80b0824..410705f 100644
--- a/apps/desktop/src/renderer/components/meeting/AddDocumentDialog.tsx
+++ b/apps/desktop/src/renderer/components/meeting/AddDocumentDialog.tsx
@@ -15,7 +15,7 @@ import { MetalCard } from '@d3ro/ui/components/ds'
 import { PhosphorText } from '@d3ro/ui/components/ds'
 import { PhysicalButton } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roTypo, d3roRadius, d3roShadow } from '@d3ro/ui/theme'
-import { useI18n } from '../../i18n'
+import { useI18n } from '@d3ro/i18n'
 
 interface TemplateItem {
   id: string
diff --git a/apps/desktop/src/renderer/components/meeting/DocumentTab.tsx b/apps/desktop/src/renderer/components/meeting/DocumentTab.tsx
index 51e1732..3336e6c 100644
--- a/apps/desktop/src/renderer/components/meeting/DocumentTab.tsx
+++ b/apps/desktop/src/renderer/components/meeting/DocumentTab.tsx
@@ -8,7 +8,7 @@ import { MarkdownEditor } from './MarkdownEditor'
 import { ExportMenu } from './ExportMenu'
 import { PhysicalButton } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roTypo } from '@d3ro/ui/theme'
-import { useI18n } from '../../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { MeetingExportFormat } from '@d3ro/core/types'
 
 interface DocumentTabDoc {
diff --git a/apps/desktop/src/renderer/components/meeting/EditableSegment.tsx b/apps/desktop/src/renderer/components/meeting/EditableSegment.tsx
index 7a92483..813df38 100644
--- a/apps/desktop/src/renderer/components/meeting/EditableSegment.tsx
+++ b/apps/desktop/src/renderer/components/meeting/EditableSegment.tsx
@@ -4,7 +4,7 @@
 import { useState, useRef, useCallback } from 'react'
 import { Box, TextField, Tooltip, Chip } from '@mui/material'
 import { d3roPalette, d3roFontMono } from '@d3ro/ui/theme'
-import { useI18n } from '../../i18n'
+import { useI18n } from '@d3ro/i18n'
 
 // Phase 15.5: 화자별 색상 매핑 (d3roPalette SSOT)
 const SPEAKER_COLORS = [
diff --git a/apps/desktop/src/renderer/components/meeting/ExportMenu.tsx b/apps/desktop/src/renderer/components/meeting/ExportMenu.tsx
index db5a243..ca8836d 100644
--- a/apps/desktop/src/renderer/components/meeting/ExportMenu.tsx
+++ b/apps/desktop/src/renderer/components/meeting/ExportMenu.tsx
@@ -6,7 +6,7 @@ import { Menu, MenuItem } from '@mui/material'
 import FileDownloadIcon from '@mui/icons-material/FileDownload'
 import { PhysicalButton } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roTypo, d3roFontMono, d3roRadius, d3roShadow } from '@d3ro/ui/theme'
-import { useI18n } from '../../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { MeetingExportFormat } from '@d3ro/core/types'
 
 interface ExportMenuProps {
diff --git a/apps/desktop/src/renderer/components/meeting/MarkdownEditor.tsx b/apps/desktop/src/renderer/components/meeting/MarkdownEditor.tsx
index bcdce8b..628a626 100644
--- a/apps/desktop/src/renderer/components/meeting/MarkdownEditor.tsx
+++ b/apps/desktop/src/renderer/components/meeting/MarkdownEditor.tsx
@@ -6,7 +6,7 @@ import { Box } from '@mui/material'
 import { MarkdownRenderer } from './MarkdownRenderer'
 import { PhysicalButton } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roFontMono, d3roTypo, d3roShadow, d3roRadius } from '@d3ro/ui/theme'
-import { useI18n } from '../../i18n'
+import { useI18n } from '@d3ro/i18n'
 
 interface MarkdownEditorProps {
   content: string
diff --git a/apps/desktop/src/renderer/components/meeting/MeetingChatPanel.tsx b/apps/desktop/src/renderer/components/meeting/MeetingChatPanel.tsx
index 0df913c..b246e7e 100644
--- a/apps/desktop/src/renderer/components/meeting/MeetingChatPanel.tsx
+++ b/apps/desktop/src/renderer/components/meeting/MeetingChatPanel.tsx
@@ -10,7 +10,7 @@ import ExpandMoreIcon from '@mui/icons-material/ExpandMore'
 import { PhosphorText } from '@d3ro/ui/components/ds'
 import { PhysicalButton } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roFontMono, d3roTypo, d3roShadow } from '@d3ro/ui/theme'
-import { useI18n } from '../../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { MeetingChatMessage } from '@d3ro/core/types'
 
 interface MeetingChatPanelProps {
diff --git a/apps/desktop/src/renderer/components/meeting/MeetingDetailTabs.tsx b/apps/desktop/src/renderer/components/meeting/MeetingDetailTabs.tsx
index 2a99bc0..5bf20b0 100644
--- a/apps/desktop/src/renderer/components/meeting/MeetingDetailTabs.tsx
+++ b/apps/desktop/src/renderer/components/meeting/MeetingDetailTabs.tsx
@@ -20,7 +20,7 @@ import { AddDocumentDialog } from './AddDocumentDialog'
 import { MeetingChatPanel } from './MeetingChatPanel'
 import { PhosphorText } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roFontMono, d3roTypo } from '@d3ro/ui/theme'
-import { useI18n } from '../../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type {
   MeetingSessionDetail,
   MeetingDocument,
diff --git a/apps/desktop/src/renderer/components/meeting/TranscriptTab.tsx b/apps/desktop/src/renderer/components/meeting/TranscriptTab.tsx
index 5a8798e..591b27e 100644
--- a/apps/desktop/src/renderer/components/meeting/TranscriptTab.tsx
+++ b/apps/desktop/src/renderer/components/meeting/TranscriptTab.tsx
@@ -7,7 +7,7 @@ import { EditableSegment } from './EditableSegment'
 import { PhysicalButton } from '@d3ro/ui/components/ds'
 import { PhosphorText } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roFontMono, d3roTypo } from '@d3ro/ui/theme'
-import { useI18n } from '../../i18n'
+import { useI18n } from '@d3ro/i18n'
 import FileDownloadIcon from '@mui/icons-material/FileDownload'
 import AutoFixHighIcon from '@mui/icons-material/AutoFixHigh'
 import RecordVoiceOverIcon from '@mui/icons-material/RecordVoiceOver'
diff --git a/apps/desktop/src/renderer/components/shared/HistoryEntryCard.tsx b/apps/desktop/src/renderer/components/shared/HistoryEntryCard.tsx
index 1991823..af32033 100644
--- a/apps/desktop/src/renderer/components/shared/HistoryEntryCard.tsx
+++ b/apps/desktop/src/renderer/components/shared/HistoryEntryCard.tsx
@@ -12,7 +12,7 @@ import SummarizeIcon from '@mui/icons-material/Summarize'
 import ExpandMoreIcon from '@mui/icons-material/ExpandMore'
 import { MetalCard, Led } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roFontMono, d3roTypo, d3roRadius } from '@d3ro/ui/theme'
-import { useI18n } from '../../i18n'
+import { useI18n } from '@d3ro/i18n'
 import { formatDuration } from '../../utils/formatters'
 import type { HistoryEntry, MemoTag, MeetingSummaryResult } from '@d3ro/core/types'
 
diff --git a/apps/desktop/src/renderer/pages/CommandsPage.tsx b/apps/desktop/src/renderer/pages/CommandsPage.tsx
index f68ebfb..615e997 100644
--- a/apps/desktop/src/renderer/pages/CommandsPage.tsx
+++ b/apps/desktop/src/renderer/pages/CommandsPage.tsx
@@ -13,7 +13,7 @@ import LinkIcon from '@mui/icons-material/Link'
 import { MetalCard, PhosphorText, Led, ScreenPanel } from '@d3ro/ui/components/ds'
 import { PageHeader, EmptyStateCard } from '../components/shared'
 import { d3roPalette, d3roFontMono, d3roTypo, d3roRadius } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import { TemplateSection } from '../components/TemplateSection'
 import type { VoiceCommandRule, VoiceCommandKeyword, KeywordMatchMode, LLMChain, ChainStep } from '@d3ro/core/types'
 
diff --git a/apps/desktop/src/renderer/pages/DashboardPage.tsx b/apps/desktop/src/renderer/pages/DashboardPage.tsx
index 8400db1..1710305 100644
--- a/apps/desktop/src/renderer/pages/DashboardPage.tsx
+++ b/apps/desktop/src/renderer/pages/DashboardPage.tsx
@@ -7,7 +7,7 @@ import { Box } from '@mui/material'
 import { CrtDisplay, InstrumentPanel, Led, MetalCard, PhosphorText, ScreenPanel, ButtonGroup, PhysicalButton } from '@d3ro/ui/components/ds'
 import { EmptyStateCard, HistoryEntryCard } from '../components/shared'
 import { d3roPalette, d3roTypo } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import { formatRecordingTime, formatRecordingTimeUnit, formatNumber, getDateKey } from '../utils/formatters'
 import { FileDropZone } from '../components/FileDropZone'
 import type { StatsSummary, HistoryEntry, HotkeyBinding, CaptionState, LicenseTier, UsageQuota } from '@d3ro/core/types'
diff --git a/apps/desktop/src/renderer/pages/DictionaryPage.tsx b/apps/desktop/src/renderer/pages/DictionaryPage.tsx
index c8a1847..d0b8b4c 100644
--- a/apps/desktop/src/renderer/pages/DictionaryPage.tsx
+++ b/apps/desktop/src/renderer/pages/DictionaryPage.tsx
@@ -9,7 +9,7 @@ import EditIcon from '@mui/icons-material/Edit'
 import { MetalCard, PhosphorText } from '@d3ro/ui/components/ds'
 import { PageHeader, SearchInput, EmptyStateCard } from '../components/shared'
 import { d3roPalette, d3roFontMono, d3roTypo } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { DictionaryEntry, DictionaryPage as DictPageData } from '@d3ro/core/types'
 
 const PAGE_SIZE = 50
diff --git a/apps/desktop/src/renderer/pages/HistoryPage.tsx b/apps/desktop/src/renderer/pages/HistoryPage.tsx
index c11dd3b..9bb2563 100644
--- a/apps/desktop/src/renderer/pages/HistoryPage.tsx
+++ b/apps/desktop/src/renderer/pages/HistoryPage.tsx
@@ -7,7 +7,7 @@ import { Box, Chip, IconButton, Tooltip } from '@mui/material'
 import FileDownloadIcon from '@mui/icons-material/FileDownload'
 import { PhosphorText } from '@d3ro/ui/components/ds'
 import { d3roPalette, d3roTypo, d3roFontMono, d3roRadius } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import { getDateKey } from '../utils/formatters'
 import { EmptyStateCard, SearchInput, PageHeader, HistoryEntryCard } from '../components/shared'
 import type { HistoryEntry, HistoryPage as HistoryPageData, TagCount } from '@d3ro/core/types'
diff --git a/apps/desktop/src/renderer/pages/KnowledgeBasePage.tsx b/apps/desktop/src/renderer/pages/KnowledgeBasePage.tsx
index f125b85..5a20efd 100644
--- a/apps/desktop/src/renderer/pages/KnowledgeBasePage.tsx
+++ b/apps/desktop/src/renderer/pages/KnowledgeBasePage.tsx
@@ -13,7 +13,7 @@ import DescriptionIcon from '@mui/icons-material/Description'
 import { MetalCard, PhosphorText, Led, PhysicalButton, ScreenPanel } from '@d3ro/ui/components/ds'
 import { PageHeader, EmptyStateCard } from '../components/shared'
 import { d3roPalette, d3roFontMono, d3roTypo } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type { RAGDocument, RAGQueryResult, RAGIndexProgress } from '@d3ro/core/types'
 
 export function KnowledgeBasePage(): React.ReactElement {
diff --git a/apps/desktop/src/renderer/pages/MeetingModePage.tsx b/apps/desktop/src/renderer/pages/MeetingModePage.tsx
index 672cbaa..d223bbb 100644
--- a/apps/desktop/src/renderer/pages/MeetingModePage.tsx
+++ b/apps/desktop/src/renderer/pages/MeetingModePage.tsx
@@ -17,7 +17,7 @@ import { MeetingDetailTabs } from '../components/meeting/MeetingDetailTabs'
 import { EditableSegment } from '../components/meeting/EditableSegment'
 import { PageHeader, EmptyStateCard } from '../components/shared'
 import { d3roPalette, d3roFontMono, d3roTypo } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type {
   MeetingSessionSummary,
   MeetingSessionDetail,
diff --git a/apps/desktop/src/renderer/pages/VoiceConversationPage.tsx b/apps/desktop/src/renderer/pages/VoiceConversationPage.tsx
index 483787b..ddb41f0 100644
--- a/apps/desktop/src/renderer/pages/VoiceConversationPage.tsx
+++ b/apps/desktop/src/renderer/pages/VoiceConversationPage.tsx
@@ -12,7 +12,7 @@ import CancelIcon from '@mui/icons-material/Cancel'
 import { MetalCard, PhosphorText, Led, PhysicalButton, ScreenPanel, InstrumentPanel } from '@d3ro/ui/components/ds'
 import { PageHeader } from '../components/shared'
 import { d3roPalette, d3roFontMono, d3roTypo } from '@d3ro/ui/theme'
-import { useI18n } from '../i18n'
+import { useI18n } from '@d3ro/i18n'
 import type {
   ConversationState,
   ConversationMessage,
diff --git a/apps/desktop/tsconfig.node.json b/apps/desktop/tsconfig.node.json
index 649f4f7..592d492 100644
--- a/apps/desktop/tsconfig.node.json
+++ b/apps/desktop/tsconfig.node.json
@@ -8,7 +8,8 @@
       "@d3ro/core": ["../../packages/core/src/index.ts"],
       "@d3ro/core/*": ["../../packages/core/src/*"],
       "@d3ro/ui": ["../../packages/ui/src/index.ts"],
-      "@d3ro/ui/*": ["../../packages/ui/src/*"]
+      "@d3ro/ui/*": ["../../packages/ui/src/*"],
+      "@d3ro/i18n": ["../../packages/i18n/src/index.tsx"]
     },
     "strict": true,
     "noImplicitAny": true,
diff --git a/apps/desktop/tsconfig.web.json b/apps/desktop/tsconfig.web.json
index e6f5ac8..695b721 100644
--- a/apps/desktop/tsconfig.web.json
+++ b/apps/desktop/tsconfig.web.json
@@ -8,7 +8,8 @@
       "@d3ro/core": ["../../packages/core/src/index.ts"],
       "@d3ro/core/*": ["../../packages/core/src/*"],
       "@d3ro/ui": ["../../packages/ui/src/index.ts"],
-      "@d3ro/ui/*": ["../../packages/ui/src/*"]
+      "@d3ro/ui/*": ["../../packages/ui/src/*"],
+      "@d3ro/i18n": ["../../packages/i18n/src/index.tsx"]
     },
     "jsx": "react-jsx",
     "strict": true,
diff --git a/apps/desktop/vitest.config.ts b/apps/desktop/vitest.config.ts
index 685360b..3618c42 100644
--- a/apps/desktop/vitest.config.ts
+++ b/apps/desktop/vitest.config.ts
@@ -18,7 +18,8 @@ export default defineConfig({
   resolve: {
     alias: {
       '@d3ro/core': resolve(__dirname, '../../packages/core/src'),
-      '@d3ro/ui': resolve(__dirname, '../../packages/ui/src')
+      '@d3ro/ui': resolve(__dirname, '../../packages/ui/src'),
+      '@d3ro/i18n': resolve(__dirname, '../../packages/i18n/src/index.tsx')
     }
   }
 })
diff --git a/memory/project_status.md b/memory/project_status.md
index df17256..6eb478f 100644
--- a/memory/project_status.md
+++ b/memory/project_status.md
@@ -6,10 +6,12 @@
 ## 현재 단계
 
 **V1 (Electron) 완료** → **V2 (Monorepo) 진행 중**
-- Phase V2-1a ✅ 완료 (Monorepo 구조 이동)
-- Phase V2-1b ✅ 완료 (packages/core 추출)
-- Phase V2-1c ✅ 완료 (packages/ui 추출)
-- 다음: Phase V2-1d (packages/i18n 추출)
+- Phase V2-1 (전체) ✅ 완료
+  - V2-1a: Monorepo 구조 이동
+  - V2-1b: packages/core 추출
+  - V2-1c: packages/ui 추출
+  - V2-1d: packages/i18n 추출
+- 다음: Phase V2-2 (Supabase 인프라)
 
 ## V1 완료 페이즈
 
@@ -40,7 +42,28 @@
 | V2-1a | npm workspaces + apps/desktop으로 V1 이동 | ✅ 완료 |
 | V2-1b | packages/core 추출 (types, errors, ipc-channels, constants, utils) | ✅ 완료 |
 | V2-1c | packages/ui 추출 (DS 컴포넌트 + theme + theme-vars) | ✅ 완료 |
-| V2-1d | packages/i18n 추출 (locale JSON + 훅) | ⏸️ 대기 |
+| V2-1d | packages/i18n 추출 (locale JSON + 훅) | ✅ 완료 |
+
+**V2-1d 완료 내역**
+- `packages/i18n/` (@d3ro/i18n) 신규 생성:
+  - `src/locales/` 12개 JSON (ko/en/ja/zh/zh-TW/es/fr/de/pt/ru/vi/th)
+  - `src/index.tsx`: TFunction, Locale, LOCALE_META, resolveTranslation, createFormatDate/Number/RelativeDate/Time, I18nContext, useI18n, I18nProvider
+- **Electron 독립성 확보**: `I18nStorage` interface 추가 (load/save 어댑터)
+  - 기존 `window.electronAPI.config` 직접 호출 → `storage` prop 주입 패턴
+  - 기본값은 noopStorage (메모리 한정)
+- `apps/desktop/src/renderer/App.tsx`에 `electronI18nStorage` 어댑터 구현 후 `<I18nProvider storage={electronI18nStorage}>`로 주입
+- apps/desktop 설정:
+  - `@d3ro/i18n: "*"` dep 추가
+  - tsconfig paths, vite alias, externalize exclude에 `@d3ro/i18n` 추가
+- **일괄 치환**: `./i18n`, `../i18n`, `../../i18n` → `@d3ro/i18n` (29 파일)
+- `apps/desktop/src/renderer/i18n/` 디렉토리 완전 제거
+
+**V2-1d 검증**
+- typecheck ✅
+- build ✅
+- dev 런타임 ✅ (DB/핫키/Ollama/Main window 모두 정상)
+- Electron 의존이 완전히 apps/desktop에만 남아 monorepo 원칙 준수
+  (packages/i18n은 React에만 의존, 웹/모바일에서 그대로 재사용 가능)
 
 **V2-1c 완료 내역**
 - `packages/ui/` (@d3ro/ui) 신규 생성:
diff --git a/package-lock.json b/package-lock.json
index 9b611e0..9b5b839 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -27,6 +27,7 @@
       "license": "MIT",
       "dependencies": {
         "@d3ro/core": "*",
+        "@d3ro/i18n": "*",
         "@d3ro/ui": "*",
         "@electron-toolkit/preload": "^3.0.2",
         "@electron-toolkit/utils": "^4.0.0",
@@ -400,6 +401,10 @@
       "resolved": "apps/desktop",
       "link": true
     },
+    "node_modules/@d3ro/i18n": {
+      "resolved": "packages/i18n",
+      "link": true
+    },
     "node_modules/@d3ro/ui": {
       "resolved": "packages/ui",
       "link": true
@@ -12820,6 +12825,17 @@
         "@types/node": "^22.13.0"
       }
     },
+    "packages/i18n": {
+      "name": "@d3ro/i18n",
+      "version": "1.0.0",
+      "license": "MIT",
+      "devDependencies": {
+        "@types/react": "^19.0.0"
+      },
+      "peerDependencies": {
+        "react": "^19.0.0"
+      }
+    },
     "packages/ui": {
       "name": "@d3ro/ui",
       "version": "1.0.0",
diff --git a/packages/i18n/package.json b/packages/i18n/package.json
new file mode 100644
index 0000000..1da99ea
--- /dev/null
+++ b/packages/i18n/package.json
@@ -0,0 +1,21 @@
+{
+  "name": "@d3ro/i18n",
+  "version": "1.0.0",
+  "private": true,
+  "description": "D3RO Voice 공유 i18n — 12개 locale, 타입 안전 키, Context, 포맷 유틸",
+  "license": "MIT",
+  "main": "./src/index.tsx",
+  "types": "./src/index.tsx",
+  "exports": {
+    ".": {
+      "types": "./src/index.tsx",
+      "default": "./src/index.tsx"
+    }
+  },
+  "peerDependencies": {
+    "react": "^19.0.0"
+  },
+  "devDependencies": {
+    "@types/react": "^19.0.0"
+  }
+}
diff --git a/apps/desktop/src/renderer/i18n/index.tsx b/packages/i18n/src/index.tsx
similarity index 80%
rename from apps/desktop/src/renderer/i18n/index.tsx
rename to packages/i18n/src/index.tsx
index 1bd6413..f0ddaf8 100644
--- a/apps/desktop/src/renderer/i18n/index.tsx
+++ b/packages/i18n/src/index.tsx
@@ -1,21 +1,22 @@
-// src/renderer/i18n/index.ts
+// packages/i18n/src/index.tsx
 // SSOT i18n 엔진: 타입 안전 키, React Context, fallback 체인, Intl 포맷팅
 // 마스터: ko.json — 모든 키의 단일 소스
+// Electron 독립: 로케일 영속화는 I18nStorage prop으로 주입받음.
 
 import { createContext, useContext, useState, useCallback, useEffect, useMemo } from 'react'
 import type { ReactNode } from 'react'
-import ko from './ko.json'
-import en from './en.json'
-import ja from './ja.json'
-import zh from './zh.json'
-import zhTW from './zh-TW.json'
-import es from './es.json'
-import fr from './fr.json'
-import de from './de.json'
-import pt from './pt.json'
-import ru from './ru.json'
-import vi from './vi.json'
-import th from './th.json'
+import ko from './locales/ko.json'
+import en from './locales/en.json'
+import ja from './locales/ja.json'
+import zh from './locales/zh.json'
+import zhTW from './locales/zh-TW.json'
+import es from './locales/es.json'
+import fr from './locales/fr.json'
+import de from './locales/de.json'
+import pt from './locales/pt.json'
+import ru from './locales/ru.json'
+import vi from './locales/vi.json'
+import th from './locales/th.json'
 
 // ── 타입 ────────────────────────────────────────────────
 /** 마스터 키에서 자동 추출된 번역 키 유니온 */
@@ -147,29 +148,52 @@ export interface I18nContextValue {
 
 const I18nContext = createContext<I18nContextValue | null>(null)
 
+// ── Storage 추상화 ────────────────────────────────────
+/**
+ * 로케일 영속화 어댑터. 앱별로 주입 (Electron config, localStorage, etc).
+ * 기본 no-op: 메모리 기반으로만 동작.
+ */
+export interface I18nStorage {
+  load: () => Promise<string | null> | string | null
+  save: (locale: Locale) => void | Promise<void>
+}
+
+const noopStorage: I18nStorage = {
+  load: () => null,
+  save: () => {}
+}
+
 // ── Provider ───────────────────────────────────────────
 export interface I18nProviderProps {
   initialLocale?: Locale
+  /** 로케일 영속화 어댑터. 없으면 메모리 기반(세션 한정). */
+  storage?: I18nStorage
   children: ReactNode
 }
 
-export function I18nProvider({ initialLocale = 'ko', children }: I18nProviderProps): React.ReactElement {
+export function I18nProvider({
+  initialLocale = 'ko',
+  storage = noopStorage,
+  children
+}: I18nProviderProps): React.ReactElement {
   const [locale, setLocaleState] = useState<Locale>(initialLocale)
 
-  // ConfigService에서 저장된 언어 로드
+  // storage에서 저장된 언어 로드
   useEffect(() => {
-    window.electronAPI.config.get({ key: 'language' }).then((r) => {
-      if (r.success && r.data && isValidLocale(r.data as string)) {
-        setLocaleState(r.data as Locale)
+    Promise.resolve(storage.load()).then((loaded) => {
+      if (loaded && isValidLocale(loaded)) {
+        setLocaleState(loaded)
       }
     })
-  }, [])
+  }, [storage])
 
-  const setLocale = useCallback((newLocale: Locale) => {
-    setLocaleState(newLocale)
-    // 설정에 저장
-    window.electronAPI.config.set({ key: 'language', value: newLocale })
-  }, [])
+  const setLocale = useCallback(
+    (newLocale: Locale) => {
+      setLocaleState(newLocale)
+      void storage.save(newLocale)
+    },
+    [storage]
+  )
 
   const value = useMemo((): I18nContextValue => {
     const translations = LOCALE_MAP[locale] ?? ko
diff --git a/apps/desktop/src/renderer/i18n/de.json b/packages/i18n/src/locales/de.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/de.json
rename to packages/i18n/src/locales/de.json
diff --git a/apps/desktop/src/renderer/i18n/en.json b/packages/i18n/src/locales/en.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/en.json
rename to packages/i18n/src/locales/en.json
diff --git a/apps/desktop/src/renderer/i18n/es.json b/packages/i18n/src/locales/es.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/es.json
rename to packages/i18n/src/locales/es.json
diff --git a/apps/desktop/src/renderer/i18n/fr.json b/packages/i18n/src/locales/fr.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/fr.json
rename to packages/i18n/src/locales/fr.json
diff --git a/apps/desktop/src/renderer/i18n/ja.json b/packages/i18n/src/locales/ja.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/ja.json
rename to packages/i18n/src/locales/ja.json
diff --git a/apps/desktop/src/renderer/i18n/ko.json b/packages/i18n/src/locales/ko.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/ko.json
rename to packages/i18n/src/locales/ko.json
diff --git a/apps/desktop/src/renderer/i18n/pt.json b/packages/i18n/src/locales/pt.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/pt.json
rename to packages/i18n/src/locales/pt.json
diff --git a/apps/desktop/src/renderer/i18n/ru.json b/packages/i18n/src/locales/ru.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/ru.json
rename to packages/i18n/src/locales/ru.json
diff --git a/apps/desktop/src/renderer/i18n/th.json b/packages/i18n/src/locales/th.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/th.json
rename to packages/i18n/src/locales/th.json
diff --git a/apps/desktop/src/renderer/i18n/vi.json b/packages/i18n/src/locales/vi.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/vi.json
rename to packages/i18n/src/locales/vi.json
diff --git a/apps/desktop/src/renderer/i18n/zh-TW.json b/packages/i18n/src/locales/zh-TW.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/zh-TW.json
rename to packages/i18n/src/locales/zh-TW.json
diff --git a/apps/desktop/src/renderer/i18n/zh.json b/packages/i18n/src/locales/zh.json
similarity index 100%
rename from apps/desktop/src/renderer/i18n/zh.json
rename to packages/i18n/src/locales/zh.json
diff --git a/packages/i18n/tsconfig.json b/packages/i18n/tsconfig.json
new file mode 100644
index 0000000..7d02dee
--- /dev/null
+++ b/packages/i18n/tsconfig.json
@@ -0,0 +1,9 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "noEmit": true,
+    "jsx": "react-jsx",
+    "lib": ["ES2022", "DOM"]
+  },
+  "include": ["src/**/*"]
+}