diff --git a/l10n/de.json b/l10n/de.json
new file mode 100644
index 0000000..bfd8512
--- /dev/null
+++ b/l10n/de.json
@@ -0,0 +1,84 @@
+{
+  "account": {
+    "address": "Adresse",
+    "addressPlaceholder": "Musterstraße 123",
+    "city": "Stadt",
+    "cityPlaceholder": "Berlin",
+    "countries": {
+      "australia": "Australien",
+      "brazil": "Brasilien",
+      "canada": "Kanada",
+      "china": "China",
+      "france": "Frankreich",
+      "germany": "Deutschland",
+      "india": "Indien",
+      "japan": "Japan",
+      "mexico": "Mexiko",
+      "southAfrica": "Südafrika",
+      "unitedKingdom": "Vereinigtes Königreich",
+      "unitedStates": "Vereinigte Staaten"
+    },
+    "country": "Land",
+    "email": "E-Mail",
+    "firstName": "Vorname",
+    "firstNamePlaceholder": "Max",
+    "lastName": "Nachname",
+    "lastNamePlaceholder": "Mustermann",
+    "managedFieldHint": "Wird vom Authentifizierungsanbieter verwaltet",
+    "phoneNumber": "Telefonnummer",
+    "photoRequirements": "Zulässig sind JPG, GIF oder PNG. Maximale Größe: 800 KB",
+    "selectCountry": "Land auswählen",
+    "stateOrProvince": "Bundesland/Provinz",
+    "statePlaceholder": "Bundesland",
+    "title": "Kontodetails",
+    "uploadPhoto": "Neues Foto hochladen",
+    "zipCode": "Postleitzahl"
+  },
+  "actions": {
+    "reset": "Zurücksetzen",
+    "saveChanges": "Änderungen speichern"
+  },
+  "nav": {
+    "preferences": "Einstellungen",
+    "profile": "Profil",
+    "profileSettings": "Profil & Einstellungen",
+    "security": "Sicherheit"
+  },
+  "notifications": {
+    "columns": {
+      "app": "App",
+      "browser": "BROWSER",
+      "email": "E-MAIL",
+      "type": "Typ"
+    },
+    "permissionDescription": "Wir benötigen die Berechtigung Ihres Browsers, um Benachrichtigungen anzuzeigen.",
+    "requestPermission": "Berechtigung anfordern",
+    "timing": {
+      "anytime": "Jederzeit",
+      "online": "Nur wenn ich online bin"
+    },
+    "timingQuestion": "Wann sollen wir Ihnen Benachrichtigungen senden?",
+    "title": "Benachrichtigungen",
+    "types": {
+      "accountActivity": "Kontoaktivität",
+      "newBrowserSignIn": "Anmeldung über einen neuen Browser",
+      "newDeviceLinked": "Ein neues Gerät wurde verknüpft",
+      "newForYou": "Neu für Sie"
+    }
+  },
+  "preferences": {
+    "languageHint": "Wird sofort angewendet und in Ihrem Konto gespeichert",
+    "languageLabel": "Anzeigesprache",
+    "languageTitle": "Sprache"
+  },
+  "security": {
+    "emptyDescription": "Derzeit sind keine Sicherheitsmodule aktiviert oder installiert.",
+    "emptyTitle": "Keine Sicherheitseinstellungen verfügbar"
+  },
+  "tabs": {
+    "account": "Konto",
+    "notifications": "Benachrichtigungen",
+    "preferences": "Einstellungen",
+    "security": "Sicherheit"
+  }
+}
diff --git a/l10n/en.json b/l10n/en.json
new file mode 100644
index 0000000..d1f6484
--- /dev/null
+++ b/l10n/en.json
@@ -0,0 +1,84 @@
+{
+  "account": {
+    "address": "Address",
+    "addressPlaceholder": "123 Main St",
+    "city": "City",
+    "cityPlaceholder": "New York",
+    "countries": {
+      "australia": "Australia",
+      "brazil": "Brazil",
+      "canada": "Canada",
+      "china": "China",
+      "france": "France",
+      "germany": "Germany",
+      "india": "India",
+      "japan": "Japan",
+      "mexico": "Mexico",
+      "southAfrica": "South Africa",
+      "unitedKingdom": "United Kingdom",
+      "unitedStates": "United States"
+    },
+    "country": "Country",
+    "email": "E-mail",
+    "firstName": "First Name",
+    "firstNamePlaceholder": "John",
+    "lastName": "Last Name",
+    "lastNamePlaceholder": "Doe",
+    "managedFieldHint": "Managed by authentication provider",
+    "phoneNumber": "Phone Number",
+    "photoRequirements": "Allowed JPG, GIF or PNG. Max size of 800K",
+    "selectCountry": "Select Country",
+    "stateOrProvince": "State/Province",
+    "statePlaceholder": "State",
+    "title": "Account Details",
+    "uploadPhoto": "Upload new photo",
+    "zipCode": "Zip Code"
+  },
+  "actions": {
+    "reset": "Reset",
+    "saveChanges": "Save changes"
+  },
+  "nav": {
+    "preferences": "Preferences",
+    "profile": "Profile",
+    "profileSettings": "Profile & Settings",
+    "security": "Security"
+  },
+  "notifications": {
+    "columns": {
+      "app": "App",
+      "browser": "BROWSER",
+      "email": "EMAIL",
+      "type": "Type"
+    },
+    "permissionDescription": "We need permission from your browser to show notifications.",
+    "requestPermission": "Request Permission",
+    "timing": {
+      "anytime": "Anytime",
+      "online": "Only when I'm online"
+    },
+    "timingQuestion": "When should we send you notifications?",
+    "title": "Notifications",
+    "types": {
+      "accountActivity": "Account activity",
+      "newBrowserSignIn": "A new browser used to sign in",
+      "newDeviceLinked": "A new device is linked",
+      "newForYou": "New for you"
+    }
+  },
+  "preferences": {
+    "languageHint": "Applies immediately and is saved to your account",
+    "languageLabel": "Display language",
+    "languageTitle": "Language"
+  },
+  "security": {
+    "emptyDescription": "No security modules are currently enabled or installed.",
+    "emptyTitle": "No Security Settings Available"
+  },
+  "tabs": {
+    "account": "Account",
+    "notifications": "Notifications",
+    "preferences": "Preferences",
+    "security": "Security"
+  }
+}
diff --git a/l10n/en.manual.json b/l10n/en.manual.json
new file mode 100644
index 0000000..7eb0827
--- /dev/null
+++ b/l10n/en.manual.json
@@ -0,0 +1,8 @@
+{
+  "nav": {
+    "preferences": "Preferences",
+    "profile": "Profile",
+    "profileSettings": "Profile & Settings",
+    "security": "Security"
+  }
+}
diff --git a/src/components/ProfileAccount.vue b/src/components/ProfileAccount.vue
index b3d8502..9f7eb55 100644
--- a/src/components/ProfileAccount.vue
+++ b/src/components/ProfileAccount.vue
@@ -2,8 +2,10 @@
 import { ref, computed, onMounted } from 'vue'
 import { useUserStore } from '@KTXC/stores/userStore'
 import { userService } from '@KTXC/services/user/userService'
+import { useL10n } from '@KTXC'
 
 const userStore = useUserStore()
+const { t } = useL10n('user_profile')
 
 const refInputEl = ref<HTMLElement>()
 const isSaving = ref(false)
@@ -134,27 +136,27 @@ const resetAvatar = () => {
   }
 }
 
-const countries = [
-  'United States',
-  'United Kingdom', 
-  'Canada',
-  'Australia',
-  'Germany',
-  'France',
-  'India',
-  'China',
-  'Japan',
-  'Brazil',
-  'Mexico',
-  'South Africa',
-]
+const countries = computed(() => [
+  { value: 'United States', title: t('account.countries.unitedStates', 'United States') },
+  { value: 'United Kingdom', title: t('account.countries.unitedKingdom', 'United Kingdom') },
+  { value: 'Canada', title: t('account.countries.canada', 'Canada') },
+  { value: 'Australia', title: t('account.countries.australia', 'Australia') },
+  { value: 'Germany', title: t('account.countries.germany', 'Germany') },
+  { value: 'France', title: t('account.countries.france', 'France') },
+  { value: 'India', title: t('account.countries.india', 'India') },
+  { value: 'China', title: t('account.countries.china', 'China') },
+  { value: 'Japan', title: t('account.countries.japan', 'Japan') },
+  { value: 'Brazil', title: t('account.countries.brazil', 'Brazil') },
+  { value: 'Mexico', title: t('account.countries.mexico', 'Mexico') },
+  { value: 'South Africa', title: t('account.countries.southAfrica', 'South Africa') },
+])
 
 </script>
 
 <template>
   <VRow>
     <VCol cols="12">
-      <VCard title="Account Details">
+      <VCard :title="t('account.title', 'Account Details')">
         <VCardText class="d-flex">
           <!-- 👉 Avatar -->
           <VAvatar
@@ -172,7 +174,7 @@ const countries = [
                 @click="refInputEl?.click()"
               >
                 <VIcon icon="mdi-cloud-upload" class="d-sm-none" />
-                <span class="d-none d-sm-block">Upload new photo</span>
+                <span class="d-none d-sm-block">{{ t('account.uploadPhoto', 'Upload new photo') }}</span>
               </VBtn>
 
               <input
@@ -190,13 +192,13 @@ const countries = [
                 variant="outlined"
                 @click="resetAvatar"
               >
-                <span class="d-none d-sm-block">Reset</span>
+                <span class="d-none d-sm-block">{{ t('actions.reset', 'Reset') }}</span>
                 <VIcon icon="mdi-refresh" class="d-sm-none" />
               </VBtn>
             </div>
 
             <p class="text-body-1 mb-0">
-              Allowed JPG, GIF or PNG. Max size of 800K
+              {{ t('account.photoRequirements', 'Allowed JPG, GIF or PNG. Max size of 800K') }}
             </p>
           </form>
         </VCardText>
@@ -214,10 +216,10 @@ const countries = [
               >
                 <VTextField
                   v-model="accountDataLocal.name_given"
-                  placeholder="John"
-                  label="First Name"
+                  :placeholder="t('account.firstNamePlaceholder', 'John')"
+                  :label="t('account.firstName', 'First Name')"
                   :readonly="!isFieldEditable('name_given')"
-                  :hint="!isFieldEditable('name_given') ? 'Managed by authentication provider' : ''"
+                  :hint="!isFieldEditable('name_given') ? t('account.managedFieldHint', 'Managed by authentication provider') : ''"
                   persistent-hint
                 />
               </VCol>
@@ -229,10 +231,10 @@ const countries = [
               >
                 <VTextField
                   v-model="accountDataLocal.name_family"
-                  placeholder="Doe"
-                  label="Last Name"
+                  :placeholder="t('account.lastNamePlaceholder', 'Doe')"
+                  :label="t('account.lastName', 'Last Name')"
                   :readonly="!isFieldEditable('name_family')"
-                  :hint="!isFieldEditable('name_family') ? 'Managed by authentication provider' : ''"
+                  :hint="!isFieldEditable('name_family') ? t('account.managedFieldHint', 'Managed by authentication provider') : ''"
                   persistent-hint
                 />
               </VCol>
@@ -244,11 +246,11 @@ const countries = [
               >
                 <VTextField
                   v-model="accountDataLocal.email"
-                  label="E-mail"
+                  :label="t('account.email', 'E-mail')"
                   placeholder="john.doe@example.com"
                   type="email"
                   :readonly="!isFieldEditable('email')"
-                  :hint="!isFieldEditable('email') ? 'Managed by authentication provider' : ''"
+                  :hint="!isFieldEditable('email') ? t('account.managedFieldHint', 'Managed by authentication provider') : ''"
                   persistent-hint
                 />
               </VCol>
@@ -260,10 +262,10 @@ const countries = [
               >
                 <VTextField
                   v-model="accountDataLocal.phone"
-                  label="Phone Number"
+                  :label="t('account.phoneNumber', 'Phone Number')"
                   placeholder="+1 (555) 123-4567"
                   :readonly="!isFieldEditable('phone')"
-                  :hint="!isFieldEditable('phone') ? 'Managed by authentication provider' : ''"
+                  :hint="!isFieldEditable('phone') ? t('account.managedFieldHint', 'Managed by authentication provider') : ''"
                   persistent-hint
                 />
               </VCol>
@@ -275,8 +277,8 @@ const countries = [
               >
                 <VTextField
                   v-model="accountDataLocal.address"
-                  label="Address"
-                  placeholder="123 Main St"
+                  :label="t('account.address', 'Address')"
+                  :placeholder="t('account.addressPlaceholder', '123 Main St')"
                 />
               </VCol>
 
@@ -287,8 +289,8 @@ const countries = [
               >
                 <VTextField
                   v-model="accountDataLocal.city"
-                  label="City"
-                  placeholder="New York"
+                  :label="t('account.city', 'City')"
+                  :placeholder="t('account.cityPlaceholder', 'New York')"
                 />
               </VCol>
 
@@ -299,8 +301,8 @@ const countries = [
               >
                 <VTextField
                   v-model="accountDataLocal.state"
-                  label="State/Province"
-                  placeholder="State"
+                  :label="t('account.stateOrProvince', 'State/Province')"
+                  :placeholder="t('account.statePlaceholder', 'State')"
                 />
               </VCol>
 
@@ -311,7 +313,7 @@ const countries = [
               >
                 <VTextField
                   v-model="accountDataLocal.zip"
-                  label="Zip Code"
+                  :label="t('account.zipCode', 'Zip Code')"
                   placeholder="10001"
                 />
               </VCol>
@@ -323,9 +325,9 @@ const countries = [
               >
                 <VSelect
                   v-model="accountDataLocal.country"
-                  label="Country"
+                  :label="t('account.country', 'Country')"
                   :items="countries"
-                  placeholder="Select Country"
+                  :placeholder="t('account.selectCountry', 'Select Country')"
                 />
               </VCol>
 
@@ -339,7 +341,7 @@ const countries = [
                   :loading="isSaving"
                   color="primary"
                 >
-                  Save changes
+                  {{ t('actions.saveChanges', 'Save changes') }}
                 </VBtn>
 
                 <VBtn
@@ -348,7 +350,7 @@ const countries = [
                   type="reset"
                   @click.prevent="resetForm"
                 >
-                  Reset
+                  {{ t('actions.reset', 'Reset') }}
                 </VBtn>
               </VCol>
             </VRow>
diff --git a/src/components/ProfileNotifications.vue b/src/components/ProfileNotifications.vue
index 248130c..a7adaf7 100644
--- a/src/components/ProfileNotifications.vue
+++ b/src/components/ProfileNotifications.vue
@@ -1,69 +1,62 @@
 <script lang="ts" setup>
-import { ref } from 'vue'
+import { computed, ref } from 'vue'
+import { useL10n } from '@KTXC'
 
-const recentDevices = ref(
-  [
-    {
-      type: 'New for you',
-      email: true,
-      browser: true,
-      app: true,
-    },
-    {
-      type: 'Account activity',
-      email: true,
-      browser: true,
-      app: true,
-    },
-    {
-      type: 'A new browser used to sign in',
-      email: true,
-      browser: true,
-      app: false,
-    },
-    {
-      type: 'A new device is linked',
-      email: true,
-      browser: false,
-      app: false,
-    },
-  ],
-)
+const { t } = useL10n('user_profile')
 
-const selectedNotification = ref('Only when I\'m online')
+const recentDevices = ref([
+  { id: 'newForYou', email: true, browser: true, app: true },
+  { id: 'accountActivity', email: true, browser: true, app: true },
+  { id: 'newBrowserSignIn', email: true, browser: true, app: false },
+  { id: 'newDeviceLinked', email: true, browser: false, app: false },
+])
+
+const notificationTypeLabels = computed<Record<string, string>>(() => ({
+  newForYou: t('notifications.types.newForYou', 'New for you'),
+  accountActivity: t('notifications.types.accountActivity', 'Account activity'),
+  newBrowserSignIn: t('notifications.types.newBrowserSignIn', 'A new browser used to sign in'),
+  newDeviceLinked: t('notifications.types.newDeviceLinked', 'A new device is linked'),
+}))
+
+const notificationTimingOptions = computed(() => [
+  { value: 'online', title: t('notifications.timing.online', 'Only when I\'m online') },
+  { value: 'anytime', title: t('notifications.timing.anytime', 'Anytime') },
+])
+
+const selectedNotification = ref('online')
 </script>
 
 <template>
-  <VCard title="Notifications">
+  <VCard :title="t('notifications.title', 'Notifications')">
     <VCardText>
-      We need permission from your browser to show notifications.
-      <a href="javascript:void(0)">Request Permission</a>
+      {{ t('notifications.permissionDescription', 'We need permission from your browser to show notifications.') }}
+      <a href="javascript:void(0)">{{ t('notifications.requestPermission', 'Request Permission') }}</a>
     </VCardText>
 
     <VTable class="text-no-wrap">
       <thead>
         <tr>
           <th scope="col">
-            Type
+            {{ t('notifications.columns.type', 'Type') }}
           </th>
           <th scope="col">
-            EMAIL
+            {{ t('notifications.columns.email', 'EMAIL') }}
           </th>
           <th scope="col">
-            BROWSER
+            {{ t('notifications.columns.browser', 'BROWSER') }}
           </th>
           <th scope="col">
-            App
+            {{ t('notifications.columns.app', 'App') }}
           </th>
         </tr>
       </thead>
       <tbody>
         <tr
           v-for="device in recentDevices"
-          :key="device.type"
+          :key="device.id"
         >
           <td>
-            {{ device.type }}
+            {{ notificationTypeLabels[device.id] }}
           </td>
           <td>
             <VCheckbox v-model="device.email" />
@@ -82,7 +75,7 @@ const selectedNotification = ref('Only when I\'m online')
     <VCardText>
       <VForm @submit.prevent="() => {}">
         <p class="text-base font-weight-medium">
-          When should we send you notifications?
+          {{ t('notifications.timingQuestion', 'When should we send you notifications?') }}
         </p>
 
         <VRow>
@@ -93,21 +86,21 @@ const selectedNotification = ref('Only when I\'m online')
             <VSelect
               v-model="selectedNotification"
               mandatory
-              :items="['Only when I\'m online', 'Anytime']"
+              :items="notificationTimingOptions"
             />
           </VCol>
         </VRow>
 
         <div class="d-flex flex-wrap gap-4 mt-4">
           <VBtn type="submit">
-            Save Changes
+            {{ t('actions.saveChanges', 'Save changes') }}
           </VBtn>
           <VBtn
             color="secondary"
             variant="outlined"
             type="reset"
           >
-            Reset
+            {{ t('actions.reset', 'Reset') }}
           </VBtn>
         </div>
       </VForm>
diff --git a/src/components/ProfilePreferences.vue b/src/components/ProfilePreferences.vue
new file mode 100644
index 0000000..1ea659a
--- /dev/null
+++ b/src/components/ProfilePreferences.vue
@@ -0,0 +1,45 @@
+<script lang="ts" setup>
+import { computed } from 'vue'
+import { useL10nStore, useL10n } from '@KTXC'
+
+const l10nStore = useL10nStore()
+const { t } = useL10n('user_profile')
+
+// Offer each available locale under its own native name
+const languageOptions = computed(() =>
+  l10nStore.available.map((locale: string) => {
+    let title = locale
+    try {
+      title = new Intl.DisplayNames([locale], { type: 'language' }).of(locale) ?? locale
+    } catch {
+      // unknown tag: fall back to the raw locale code
+    }
+    return { value: locale, title }
+  })
+)
+
+const selectLanguage = (locale: string | null) => {
+  if (locale && locale !== l10nStore.locale) {
+    l10nStore.setLocale(locale)
+  }
+}
+</script>
+
+<template>
+  <VRow>
+    <VCol cols="12" md="6">
+      <VCard :title="t('preferences.languageTitle', 'Language')">
+        <VCardText>
+          <VSelect
+            :model-value="l10nStore.locale"
+            :items="languageOptions"
+            :label="t('preferences.languageLabel', 'Display language')"
+            :hint="t('preferences.languageHint', 'Applies immediately and is saved to your account')"
+            persistent-hint
+            @update:model-value="selectLanguage"
+          />
+        </VCardText>
+      </VCard>
+    </VCol>
+  </VRow>
+</template>
diff --git a/src/components/ProfileSecurity.vue b/src/components/ProfileSecurity.vue
index 8cdbeae..459f4d7 100644
--- a/src/components/ProfileSecurity.vue
+++ b/src/components/ProfileSecurity.vue
@@ -1,8 +1,10 @@
 <script lang="ts" setup>
 import { ref, computed, onMounted } from 'vue'
 import { useIntegrationStore } from '@KTXC/stores/integrationStore'
+import { useL10n } from '@KTXC'
 
 const integrationStore = useIntegrationStore()
+const { t } = useL10n('user_profile')
 
 // Get all registered security panel components from modules
 const securityPanels = computed(() => {
@@ -59,9 +61,11 @@ onMounted(async () => {
             class="mb-4"
             color="grey"
           />
-          <p class="text-h6 mb-2">No Security Settings Available</p>
+          <p class="text-h6 mb-2">
+            {{ t('security.emptyTitle', 'No Security Settings Available') }}
+          </p>
           <p class="text-body-2 text-medium-emphasis">
-            No security modules are currently enabled or installed.
+            {{ t('security.emptyDescription', 'No security modules are currently enabled or installed.') }}
           </p>
         </VCardText>
       </VCard>
diff --git a/src/integrations.ts b/src/integrations.ts
index a457855..a26d373 100644
--- a/src/integrations.ts
+++ b/src/integrations.ts
@@ -5,17 +5,19 @@ const integrations: ModuleIntegrations = {
     {
       id: 'user_profile',
       label: 'Profile & Settings',
+      l10n: 'nav.profileSettings',
       path: '/me',
       icon: 'mdi-account-outline',
       priority: 90,
     },
   ],
-  
+
   // User personal settings
   user_settings_menu: [
     {
       id: 'profile',
       label: 'Profile',
+      l10n: 'nav.profile',
       path: '/me/profile',
       icon: 'mdi-account-circle',
       priority: 10,
@@ -23,6 +25,7 @@ const integrations: ModuleIntegrations = {
     {
       id: 'preferences',
       label: 'Preferences',
+      l10n: 'nav.preferences',
       path: '/me/preferences',
       icon: 'mdi-tune',
       priority: 20,
@@ -30,6 +33,7 @@ const integrations: ModuleIntegrations = {
     {
       id: 'security',
       label: 'Security',
+      l10n: 'nav.security',
       path: '/me/security',
       icon: 'mdi-shield-lock',
       priority: 30,
diff --git a/src/main.ts b/src/main.ts
index 6c2da1a..543b1e4 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,4 +1,7 @@
 import routes from '@/routes'
 import integrations from '@/integrations'
 
+// Module ships translation catalogs at static/l10n/{locale}.json
+export const l10n = true
+
 export { routes, integrations }
diff --git a/src/views/ProfilePage.vue b/src/views/ProfilePage.vue
index 85287d8..226860b 100644
--- a/src/views/ProfilePage.vue
+++ b/src/views/ProfilePage.vue
@@ -1,20 +1,24 @@
 <script lang="ts" setup>
-import { ref } from 'vue'
+import { computed, ref } from 'vue'
 import { useRoute } from 'vue-router'
 import ProfileAccount from '@/components/ProfileAccount.vue'
 import ProfileNotifications from '@/components/ProfileNotifications.vue'
+import ProfilePreferences from '@/components/ProfilePreferences.vue'
 import ProfileSecurity from '@/components/ProfileSecurity.vue'
+import { useL10n } from '@KTXC'
 
 const route = useRoute()
+const { t } = useL10n('user_profile')
 
 const activeTab = ref(route.params.tab || 'account')
 
 // tabs
-const tabs = [
-  { title: 'Account', icon: 'mdi-account-outline', tab: 'account' },
-  { title: 'Security', icon: 'mdi-lock-outline', tab: 'security' },
-  { title: 'Notifications', icon: 'mdi-bell-outline', tab: 'notifications' },
-]
+const tabs = computed(() => [
+  { title: t('tabs.account', 'Account'), icon: 'mdi-account-outline', tab: 'account' },
+  { title: t('tabs.security', 'Security'), icon: 'mdi-lock-outline', tab: 'security' },
+  { title: t('tabs.preferences', 'Preferences'), icon: 'mdi-tune', tab: 'preferences' },
+  { title: t('tabs.notifications', 'Notifications'), icon: 'mdi-bell-outline', tab: 'notifications' },
+])
 </script>
 
 <template>
@@ -61,6 +65,11 @@ const tabs = [
       <VWindowItem value="notifications">
         <ProfileNotifications />
       </VWindowItem>
+
+      <!-- Preferences -->
+      <VWindowItem value="preferences">
+        <ProfilePreferences />
+      </VWindowItem>
     </VWindow>
   </PerfectScrollbar>
 </template>
diff --git a/vite.config.ts b/vite.config.ts
index 7d68018..40494ec 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,10 +1,30 @@
-import { defineConfig } from 'vite'
+import { defineConfig, type PluginOption } from 'vite'
 import vue from '@vitejs/plugin-vue'
 import path from 'path'
+import fs from 'fs'
+
+// Copy translation catalogs (l10n/*.json, except the extractor-only
+// en.manual.json) into static/l10n/ so the core shell can fetch them at
+// /modules/{handle}/static/l10n/{locale}.json
+const copyL10nCatalogs = (): PluginOption => ({
+  name: 'copy-l10n-catalogs',
+  apply: 'build',
+  closeBundle() {
+    const sourceDir = path.resolve(__dirname, 'l10n')
+    const outDir = path.resolve(__dirname, 'static/l10n')
+    if (!fs.existsSync(sourceDir)) return
+    fs.mkdirSync(outDir, { recursive: true })
+    for (const file of fs.readdirSync(sourceDir)) {
+      if (file.endsWith('.json') && !file.endsWith('.manual.json')) {
+        fs.copyFileSync(path.join(sourceDir, file), path.join(outDir, file))
+      }
+    }
+  },
+})
 
 // https://vite.dev/config/
 export default defineConfig({
-  plugins: [vue()],
+  plugins: [vue(), copyL10nCatalogs()],
   resolve: {
     alias: {
       '@': path.resolve(__dirname, './src'),
@@ -20,7 +40,10 @@ export default defineConfig({
       fileName: () => 'module.mjs',
     },
     rollupOptions: {
-      external: ['vue', 'vue-router', 'pinia'],
+      external: ['vue', 'vue-router', 'pinia', '@KTXC'],
+      output: {
+        paths: (id) => (id === '@KTXC' ? '/js/ktxc.mjs' : id),
+      },
     },
   },
 })