diff --git a/locales/ar.json b/locales/ar.json
index b0ee13da..841fbf06 100644
--- a/locales/ar.json
+++ b/locales/ar.json
@@ -91,11 +91,6 @@
     "toggle_zen_mode": "تبديل الوضع الهادئ"
   },
   "common": {
-    "confirm_dialog": {
-      "cancel": "لا",
-      "confirm": "نعم",
-      "title": "هل أنت متأكد؟"
-    },
     "end_of_list": "نهاية القائمة",
     "error": "حدث خطأ",
     "in": "في",
@@ -191,11 +186,6 @@
     "copy_original_link_to_post": "انسخ الرابط الأصلي لهذا المنشور",
     "delete": "حذف",
     "delete_and_redraft": "حذف وإعادة صياغة",
-    "delete_confirm": {
-      "cancel": "إلغاء",
-      "confirm": "حذف",
-      "title": "هل أنت متأكد أنك تريد حذف هذا المنشور؟"
-    },
     "direct_message_account": "إرسال رسالة مباشرة إلى {0}",
     "edit": "تعديل",
     "hide_reblogs": "إخفاء المشاركات من {0}",
@@ -314,12 +304,6 @@
       "description": "قم بتحرير إعدادات حسابك في موقع ماستودون الأصل",
       "label": "إعدادت الحساب"
     },
-    "feature_flags": {
-      "github_cards": "بطاقات GitHub",
-      "title": "الميزات التجريبية",
-      "user_picker": "الشريط الجانبي لمبدل المستخدم",
-      "virtual_scroll": "التمرير الافتراضي"
-    },
     "interface": {
       "color_mode": "وضع اللون",
       "dark_mode": "الوضع الداكن",
diff --git a/locales/ca-valencia.json b/locales/ca-valencia.json
index 5d16c8b3..d83ce706 100644
--- a/locales/ca-valencia.json
+++ b/locales/ca-valencia.json
@@ -54,7 +54,6 @@
     "not_found": "404 No s'ha trobat",
     "offline_desc": "Sembla que estàs fora de línia. Comprova la connexió de xarxa."
   },
-  "compose": {},
   "confirm": {
     "block_account": {
       "cancel": "Cancel·la",
@@ -91,7 +90,6 @@
       "title": "Segur que vols deixar de seguir-lo?"
     }
   },
-  "conversation": {},
   "custom_cards": {
     "stackblitz": {
       "open": "Obri",
@@ -119,7 +117,6 @@
     "footer_team": "L'equip d'Elk",
     "title": "Elk està en proves!"
   },
-  "language": {},
   "list": {
     "add_account": "Afig el compte a una llista",
     "create": "Crea",
diff --git a/locales/cs-CZ.json b/locales/cs-CZ.json
index 9648f526..694fdf50 100644
--- a/locales/cs-CZ.json
+++ b/locales/cs-CZ.json
@@ -142,13 +142,6 @@
     "replying": "Sem napište odpověď",
     "the_thread": "vlákno"
   },
-  "settings": {
-    "feature_flags": {
-      "github_cards": "GitHub Cards",
-      "user_picker": "User Picker",
-      "virtual_scroll": "Virtual Scrolling"
-    }
-  },
   "state": {
     "edited": "(Upraveno)",
     "editing": "Upravuje se",
diff --git a/locales/de-DE.json b/locales/de-DE.json
index 7cd9a2e8..5dc480fe 100644
--- a/locales/de-DE.json
+++ b/locales/de-DE.json
@@ -28,7 +28,6 @@
     "muted_users": "Stummgeschaltete Accounts",
     "muting": "Stummgeschaltet",
     "mutuals": "Freunde",
-    "notify_on_post": "Benachrichtige mich, wenn {username} etwas postet",
     "pinned": "Angepinnt",
     "posts": "Beiträge",
     "posts_count": "{0} Beiträge",
@@ -102,8 +101,7 @@
   "confirm": {
     "common": {
       "cancel": "Abbrechen",
-      "confirm": "OK",
-      "title": "Bist du sicher, {0}?"
+      "confirm": "OK"
     },
     "delete_posts": {
       "cancel": "Abbrechen",
@@ -256,12 +254,6 @@
       "description": "Bearbeite Kontoeinstellungen in der Mastodon-Benutzeroberfläche",
       "label": "Account Einstellungen"
     },
-    "feature_flags": {
-      "github_cards": "GitHub Cards",
-      "title": "Experimentelle Funktionen",
-      "user_picker": "Benutzerauswahl",
-      "virtual_scroll": "Virtuelles Scrollen"
-    },
     "interface": {
       "color_mode": "Farbschema",
       "dark_mode": "Dunkles Farbschema",
diff --git a/locales/fi-FI.json b/locales/fi-FI.json
index 8cb79f5e..136794ef 100644
--- a/locales/fi-FI.json
+++ b/locales/fi-FI.json
@@ -295,13 +295,6 @@
       "font_size": "Kirjasinkoko",
       "label": "Käyttöliittymä",
       "light_mode": "Vaalea",
-      "size_label": {
-        "lg": "Suuri",
-        "md": "Keski",
-        "sm": "Pieni",
-        "xl": "Ekstra-suuri",
-        "xs": "Ekstra-pieni"
-      },
       "system_mode": "Laitteen asetus",
       "theme_color": "Korostusväri"
     },
diff --git a/locales/id-ID.json b/locales/id-ID.json
index af8f83fe..a1aa2beb 100644
--- a/locales/id-ID.json
+++ b/locales/id-ID.json
@@ -30,7 +30,6 @@
     "mutuals": "Terkait",
     "notifications_on_post_disable": "Berhenti memberi tahu saya saat {username} memposting",
     "notifications_on_post_enable": "Beri tahu saya jika {username} memposting",
-    "notify_on_post": "Beri tahu saya jika {username} memposting",
     "pinned": "Dilekatkan",
     "posts": "Posting",
     "posts_count": "{0} Pos|{0} Pos|{0} Pos",
@@ -92,11 +91,6 @@
     "toggle_zen_mode": "Beralih ke modus zen"
   },
   "common": {
-    "confirm_dialog": {
-      "cancel": "Tidak",
-      "confirm": "Ya",
-      "title": "Apakah Anda yakin {0}?"
-    },
     "end_of_list": "Akhir dari daftar",
     "error": "KESALAHAN",
     "in": "di dalam",
@@ -180,11 +174,6 @@
     "copy_link_to_post": "Salin tautan pos ini",
     "delete": "Hapus",
     "delete_and_redraft": "Hapus dan buat ulang draf",
-    "delete_confirm": {
-      "cancel": "Batalkan",
-      "confirm": "Hapus",
-      "title": "Yakin ingin menghapus postingan ini?"
-    },
     "direct_message_account": "Pesan langsung {0}",
     "edit": "Sunting",
     "hide_reblogs": "Sembunyikan dukungan dari {0}",
diff --git a/locales/nl-NL.json b/locales/nl-NL.json
index 24d4e2c0..49597b8d 100644
--- a/locales/nl-NL.json
+++ b/locales/nl-NL.json
@@ -193,12 +193,6 @@
     "about": {
       "label": "Over"
     },
-    "feature_flags": {
-      "github_cards": "GitHub Cards",
-      "title": "Experimentele Functies",
-      "user_picker": "Gebruiker Kiezer",
-      "virtual_scroll": "Virtueel Scrollen"
-    },
     "interface": {
       "color_mode": "Kleur Modus",
       "dark_mode": "Donkere Modus",
@@ -284,7 +278,6 @@
     }
   },
   "state": {
-
     "attachments_exceed_server_limit": "De hoeveelheid bijlagen is meer dan het limiet per post.",
     "attachments_limit_error": "Limiet per post overschreden",
     "edited": "(Aangepast)",
diff --git a/locales/ru-RU.json b/locales/ru-RU.json
index d44d7261..0eec1898 100644
--- a/locales/ru-RU.json
+++ b/locales/ru-RU.json
@@ -59,7 +59,6 @@
     "more": "Больше",
     "next": "Следующее",
     "prev": "Предыдущее",
-    "previous": "Предыдущее",
     "publish": "Опубликовать",
     "reply": "Ответить",
     "reply_count": "{0}",
@@ -90,11 +89,6 @@
     "toggle_zen_mode": "Переключить режим дзен"
   },
   "common": {
-    "confirm_dialog": {
-      "cancel": "Нет",
-      "confirm": "Да",
-      "title": "Вы уверены?"
-    },
     "end_of_list": "Конец списка",
     "error": "ОШИБКА",
     "in": "в",
@@ -171,11 +165,6 @@
     "copy_link_to_post": "Скопировать ссылку на этот пост",
     "delete": "Удалить",
     "delete_and_redraft": "Удалить и переписать",
-    "delete_confirm": {
-      "cancel": "Отменить",
-      "confirm": "Удалить",
-      "title": "Вы уверены, что хотите удалить этот пост?"
-    },
     "direct_message_account": "Отправьте личное сообщение {0}",
     "edit": "Редактировать",
     "hide_reblogs": "Скрыть репосты от {0}",
@@ -295,13 +284,6 @@
       "font_size": "Размер текста",
       "label": "Интерфейс",
       "light_mode": "Светлая",
-      "size_label": {
-        "lg": "Большой",
-        "md": "Средний",
-        "sm": "Маленький",
-        "xl": "Очень большой",
-        "xs": "Очень маленький"
-      },
       "system_mode": "Системная",
       "theme_color": "Цвет"
     },
diff --git a/locales/tr-TR.json b/locales/tr-TR.json
index b9133679..64e58631 100644
--- a/locales/tr-TR.json
+++ b/locales/tr-TR.json
@@ -99,8 +99,7 @@
   "confirm": {
     "common": {
       "cancel": "Hayır",
-      "confirm": "Evet",
-      "title": "Emin misiniz?"
+      "confirm": "Evet"
     },
     "delete_posts": {
       "cancel": "İptal et",
diff --git a/locales/uk-UA.json b/locales/uk-UA.json
index b09b5b08..6513db71 100644
--- a/locales/uk-UA.json
+++ b/locales/uk-UA.json
@@ -216,10 +216,6 @@
       "description": "Відредагуйте налаштування облікового запису використовуєчи інтерфейс Mastodon",
       "label": "Налаштування облікового запису"
     },
-    "feature_flags": {
-      "github_cards": "GitHub картки",
-      "title": "Експериментальні налаштування"
-    },
     "interface": {
       "color_mode": "Кольорова тема",
       "dark_mode": "Темна",
diff --git a/locales/zh-TW.json b/locales/zh-TW.json
index adbd14f0..74f134b7 100644
--- a/locales/zh-TW.json
+++ b/locales/zh-TW.json
@@ -30,7 +30,6 @@
     "mutuals": "互相關注",
     "notifications_on_post_disable": "當 {username} 發布時，停止通知我",
     "notifications_on_post_enable": "當 {username} 發布時，通知我",
-    "notify_on_post": "{username} 發文時通知我",
     "pinned": "置頂的貼文",
     "posts": "貼文",
     "posts_count": "{0} 則貼文",
@@ -63,7 +62,6 @@
     "more": "更多",
     "next": "下一個",
     "prev": "上一個",
-    "previous": "之前的",
     "publish": "發布",
     "reply": "回覆",
     "reply_count": "{0}",
@@ -94,11 +92,6 @@
     "toggle_zen_mode": "切換禪模式"
   },
   "common": {
-    "confirm_dialog": {
-      "cancel": "取消",
-      "confirm": "確認",
-      "title": "你確定嗎？"
-    },
     "end_of_list": "清單到底了",
     "error": "錯誤",
     "in": "在",
diff --git a/package.json b/package.json
index 675a1070..311baa26 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "test:typecheck": "stale-dep && vue-tsc --noEmit && vue-tsc --noEmit --project service-worker/tsconfig.json",
     "test": "nr test:unit",
     "update:team:avatars": "esno scripts/avatars.ts",
+    "cleanup-translations": "esno scripts/cleanup-translations.ts",
     "prepare-translation-status": "esno scripts/prepare-translation-status.ts",
     "postinstall": "ignore-dependency-scripts \"stale-dep -u && simple-git-hooks && nuxi prepare && nr prepare-translation-status\"",
     "release": "stale-dep && bumpp && esno scripts/release.ts"
diff --git a/scripts/cleanup-translations.ts b/scripts/cleanup-translations.ts
new file mode 100644
index 00000000..58646c1e
--- /dev/null
+++ b/scripts/cleanup-translations.ts
@@ -0,0 +1,65 @@
+import flatten from 'flat'
+import { createResolver } from '@nuxt/kit'
+import fs from 'fs-extra'
+import { currentLocales } from '../config/i18n'
+
+const resolver = createResolver(import.meta.url)
+
+const sourceLanguageLocale = currentLocales.find(l => l.code === 'en-US')!
+
+function merge(src: Record<string, any>, dst: Record<string, any>) {
+  for (const key in src) {
+    if (typeof src[key] === 'object') {
+      if (!dst[key])
+        dst[key] = {}
+
+      merge(src[key], dst[key])
+    }
+    else {
+      dst[key] = src[key]
+    }
+  }
+}
+
+const sourceFiles: string[] = sourceLanguageLocale.files ? sourceLanguageLocale.files : [sourceLanguageLocale.file!]
+
+const sourceTranslations: Record<string, string> = {}
+
+for (const file of sourceFiles) {
+  const data = JSON.parse(Buffer.from(
+    await fs.readFile(resolver.resolve(`../locales/${file}`), 'utf-8'),
+  ).toString()) as Record<string, unknown>
+
+  merge(flatten(data), sourceTranslations)
+}
+
+async function removeOutdatedTranslations() {
+  for (const locale of currentLocales.filter(l => l.code !== 'en-US')) {
+    const files: string[] = locale.files ? locale.files : [locale.file!]
+
+    for (const file of files) {
+      const path = resolver.resolve(`../locales/${file}`)
+
+      const data = JSON.parse(Buffer.from(
+        await fs.readFile(path, 'utf-8'),
+      ).toString())
+
+      const targetTranslations: Record<string, string> = flatten(data)
+
+      for (const key in targetTranslations) {
+        if (!sourceTranslations[key])
+          delete targetTranslations[key]
+      }
+
+      const unflattened = flatten.unflatten(targetTranslations)
+
+      await fs.writeFile(
+        path,
+        `${JSON.stringify(unflattened, null, 2)}\n`,
+        { encoding: 'utf-8' },
+      )
+    }
+  }
+}
+
+removeOutdatedTranslations()