diff --git a/docs/plugins/development/reading-time.md b/docs/plugins/development/reading-time.md
index 62cd631fdb..319baf521e 100644
--- a/docs/plugins/development/reading-time.md
+++ b/docs/plugins/development/reading-time.md
@@ -116,7 +116,6 @@ const readingTimeLocale = useReadingTimeLocale() // { time: "1 minute", words: "
 - **Traditional Chinese** (zh-TW)
 - **English (United States)** (en-US)
 - **German** (de-DE)
-- **German (Australia)** (de-AT)
 - **Russian** (ru-RU)
 - **Ukrainian** (uk-UA)
 - **Vietnamese** (vi-VN)
diff --git a/docs/plugins/features/catalog.md b/docs/plugins/features/catalog.md
index b277e42753..4273167aa3 100644
--- a/docs/plugins/features/catalog.md
+++ b/docs/plugins/features/catalog.md
@@ -168,7 +168,6 @@ Project with order -1
 - **Traditional Chinese** (zh-TW)
 - **English (United States)** (en-US)
 - **German** (de-DE)
-- **German (Australia)** (de-AT)
 - **Russian** (ru-RU)
 - **Ukrainian** (uk-UA)
 - **Vietnamese** (vi-VN)
diff --git a/docs/plugins/features/copyright.md b/docs/plugins/features/copyright.md
index ba0a2a4bfb..df2678ff36 100644
--- a/docs/plugins/features/copyright.md
+++ b/docs/plugins/features/copyright.md
@@ -192,7 +192,6 @@ So copyright message triggered on another site also points to your preferred sit
 - **Traditional Chinese** (zh-TW)
 - **English (United States)** (en-US)
 - **German** (de-DE)
-- **German (Australia)** (de-AT)
 - **Russian** (ru-RU)
 - **Ukrainian** (uk-UA)
 - **Vietnamese** (vi-VN)
diff --git a/docs/plugins/features/photo-swipe.md b/docs/plugins/features/photo-swipe.md
index ae8444fc19..ef0e674124 100644
--- a/docs/plugins/features/photo-swipe.md
+++ b/docs/plugins/features/photo-swipe.md
@@ -154,7 +154,6 @@ In preview mode, you can:
 - **Traditional Chinese** (zh-TW)
 - **English (United States)** (en-US)
 - **German** (de-DE)
-- **German (Australia)** (de-AT)
 - **Russian** (ru-RU)
 - **Ukrainian** (uk-UA)
 - **Vietnamese** (vi-VN)
diff --git a/docs/plugins/pwa/pwa/config.md b/docs/plugins/pwa/pwa/config.md
index 37166f90ff..61d01f34b0 100644
--- a/docs/plugins/pwa/pwa/config.md
+++ b/docs/plugins/pwa/pwa/config.md
@@ -256,7 +256,6 @@ Special settings for better supporting Safari, ignoring these options are safe.
 - **Traditional Chinese** (zh-TW)
 - **English (United States)** (en-US)
 - **German** (de-DE)
-- **German (Australia)** (de-AT)
 - **Russian** (ru-RU)
 - **Ukrainian** (uk-UA)
 - **Vietnamese** (vi-VN)
diff --git a/docs/plugins/search/slimsearch.md b/docs/plugins/search/slimsearch.md
index fc195a811b..664d2057a0 100644
--- a/docs/plugins/search/slimsearch.md
+++ b/docs/plugins/search/slimsearch.md
@@ -402,7 +402,6 @@ Multilingual configuration of the search plugin.
 - **Traditional Chinese** (zh-TW)
 - **English (United States)** (en-US)
 - **German** (de-DE)
-- **German (Australia)** (de-AT)
 - **Russian** (ru-RU)
 - **Ukrainian** (uk-UA)
 - **Vietnamese** (vi-VN)
diff --git a/docs/zh/plugins/development/reading-time.md b/docs/zh/plugins/development/reading-time.md
index ab52570307..d3ac395042 100644
--- a/docs/zh/plugins/development/reading-time.md
+++ b/docs/zh/plugins/development/reading-time.md
@@ -116,7 +116,6 @@ const readingTimeLocale = useReadingTimeLocale() // { time: "1 分钟", words: "
 - **繁体中文** (zh-TW)
 - **英文(美国)** (en-US)
 - **德语** (de-DE)
-- **德语(澳大利亚)** (de-AT)
 - **俄语** (ru-RU)
 - **乌克兰语** (uk-UA)
 - **越南语** (vi-VN)
diff --git a/docs/zh/plugins/features/catalog.md b/docs/zh/plugins/features/catalog.md
index f425752b2e..a1839fb08f 100644
--- a/docs/zh/plugins/features/catalog.md
+++ b/docs/zh/plugins/features/catalog.md
@@ -166,7 +166,6 @@ order -1 的项目
 - **繁体中文** (zh-TW)
 - **英文(美国)** (en-US)
 - **德语** (de-DE)
-- **德语(澳大利亚)** (de-AT)
 - **俄语** (ru-RU)
 - **乌克兰语** (uk-UA)
 - **越南语** (vi-VN)
diff --git a/docs/zh/plugins/features/copyright.md b/docs/zh/plugins/features/copyright.md
index b064a36e68..67cbe76e81 100644
--- a/docs/zh/plugins/features/copyright.md
+++ b/docs/zh/plugins/features/copyright.md
@@ -193,7 +193,6 @@ export default {
 - **繁体中文** (zh-TW)
 - **英文(美国)** (en-US)
 - **德语** (de-DE)
-- **德语(澳大利亚)** (de-AT)
 - **俄语** (ru-RU)
 - **乌克兰语** (uk-UA)
 - **越南语** (vi-VN)
diff --git a/docs/zh/plugins/features/photo-swipe.md b/docs/zh/plugins/features/photo-swipe.md
index 999ac4c151..b97921f552 100644
--- a/docs/zh/plugins/features/photo-swipe.md
+++ b/docs/zh/plugins/features/photo-swipe.md
@@ -154,7 +154,6 @@ export default {
 - **繁体中文** (zh-TW)
 - **英文(美国)** (en-US)
 - **德语** (de-DE)
-- **德语(澳大利亚)** (de-AT)
 - **俄语** (ru-RU)
 - **乌克兰语** (uk-UA)
 - **越南语** (vi-VN)
diff --git a/docs/zh/plugins/pwa/pwa/config.md b/docs/zh/plugins/pwa/pwa/config.md
index 5c9ee7f7fa..5e9bd5ac5b 100644
--- a/docs/zh/plugins/pwa/pwa/config.md
+++ b/docs/zh/plugins/pwa/pwa/config.md
@@ -255,7 +255,6 @@
 - **繁体中文** (zh-TW)
 - **英文(美国)** (en-US)
 - **德语** (de-DE)
-- **德语(澳大利亚)** (de-AT)
 - **俄语** (ru-RU)
 - **乌克兰语** (uk-UA)
 - **越南语** (vi-VN)
diff --git a/docs/zh/plugins/search/slimsearch.md b/docs/zh/plugins/search/slimsearch.md
index 89bcdc0ee2..adb8f2be57 100644
--- a/docs/zh/plugins/search/slimsearch.md
+++ b/docs/zh/plugins/search/slimsearch.md
@@ -400,7 +400,6 @@ export default defineUserConfig({
 - **繁体中文** (zh-TW)
 - **英文(美国)** (en-US)
 - **德语** (de-DE)
-- **德语(澳大利亚)** (de-AT)
 - **俄语** (ru-RU)
 - **乌克兰语** (uk-UA)
 - **越南语** (vi-VN)
diff --git a/plugins/blog/plugin-comment/src/node/locales.ts b/plugins/blog/plugin-comment/src/node/locales.ts
index 06e69ddbab..b1fd29f333 100644
--- a/plugins/blog/plugin-comment/src/node/locales.ts
+++ b/plugins/blog/plugin-comment/src/node/locales.ts
@@ -27,13 +27,6 @@ export const walineLocalesInfo: DefaultLocaleInfo<WalineLocaleData> = [
         'Schreibe ein Kommentar (Geben Sie die E-Mail-Adresse ein, um eine E-Mail-Benachrichtigung zu erhalten, wenn Sie eine Antwort erhalten)',
     },
   ],
-  [
-    ['de-AT'],
-    {
-      placeholder:
-        'Schreibe ein Kommentar (Geben Sie die E-Mail-Adresse ein, um eine E-Mail-Benachrichtigung zu erhalten, wenn Sie eine Antwort erhalten)',
-    },
-  ],
   [
     ['vi', 'vi-VN'],
     {
diff --git a/plugins/development/plugin-reading-time/src/node/locales.ts b/plugins/development/plugin-reading-time/src/node/locales.ts
index dd9b3e5fde..bc4bbb4562 100644
--- a/plugins/development/plugin-reading-time/src/node/locales.ts
+++ b/plugins/development/plugin-reading-time/src/node/locales.ts
@@ -38,14 +38,6 @@ export const readingTimeLocaleInfo: DefaultLocaleInfo<ReadingTimePluginLocaleDat
         time: 'Ungefähr $time min',
       },
     ],
-    [
-      ['de-AT'],
-      {
-        word: 'Um die $word Wörter',
-        less1Minute: 'Weniger als eine Minute',
-        time: 'Ungefähr $time min',
-      },
-    ],
     [
       ['vi', 'vi-VN'],
       {
diff --git a/plugins/features/plugin-back-to-top/src/node/locales.ts b/plugins/features/plugin-back-to-top/src/node/locales.ts
index e20a096c08..41f04c61b2 100644
--- a/plugins/features/plugin-back-to-top/src/node/locales.ts
+++ b/plugins/features/plugin-back-to-top/src/node/locales.ts
@@ -10,7 +10,6 @@ export const backToTopLocaleInfo: DefaultLocaleInfo<BackToTopPluginLocaleData> =
     [['zh', 'zh-CN', 'zh-Hans'], { backToTop: '返回顶部' }],
     [['zh-TW', 'zh-Hant'], { backToTop: '返回頂部' }],
     [['de', 'de-DE'], { backToTop: 'Zurück nach oben.' }],
-    [['de-AT'], { backToTop: 'Zurück nach oben.' }],
     [['vi', 'vi-VN'], { backToTop: 'Trở lại đầu trang' }],
     [['uk'], { backToTop: 'Повернутися до початку' }],
     [['ru', 'ru-RU'], { backToTop: 'Вернуться к началу' }],
diff --git a/plugins/features/plugin-catalog/src/node/locales.ts b/plugins/features/plugin-catalog/src/node/locales.ts
index a2aaca87ba..02c94a67f4 100644
--- a/plugins/features/plugin-catalog/src/node/locales.ts
+++ b/plugins/features/plugin-catalog/src/node/locales.ts
@@ -9,7 +9,6 @@ export const catalogLocaleInfo: DefaultLocaleInfo<CatalogPluginLocaleData> = [
   [['zh', 'zh-CN', 'zh-Hans'], { title: '目录', empty: '暂无目录' }],
   [['zh-TW', 'zh-Hant'], { title: '目錄', empty: '暫無目錄' }],
   [['de', 'de-DE'], { title: 'Katalog', empty: 'Kein Katalog' }],
-  [['de-AT'], { title: 'Katalog', empty: 'Kein Katalog' }],
   [['vi', 'vi-VN'], { title: 'Danh mục', empty: 'Không có danh mục' }],
   [['uk'], { title: 'Каталог', empty: 'Немає каталогу' }],
   [['ru', 'ru-RU'], { title: 'Каталог', empty: 'Нет каталога' }],
diff --git a/plugins/features/plugin-copyright/src/node/locales.ts b/plugins/features/plugin-copyright/src/node/locales.ts
index 1d93ab889c..5e3c08503f 100644
--- a/plugins/features/plugin-copyright/src/node/locales.ts
+++ b/plugins/features/plugin-copyright/src/node/locales.ts
@@ -110,14 +110,6 @@ export const copyrightLocaleInfo: DefaultLocaleInfo<CopyrightPluginLocaleData> =
         link: ':link',
       },
     ],
-    [
-      ['de-AT'],
-      {
-        author: 'Copyright by :author',
-        license: 'Lizenziert unter :license',
-        link: ':link',
-      },
-    ],
     [
       ['hu', 'hu-HU'],
       {
diff --git a/plugins/features/plugin-photo-swipe/src/node/locales.ts b/plugins/features/plugin-photo-swipe/src/node/locales.ts
index fd75a7bb45..d6defe63e6 100644
--- a/plugins/features/plugin-photo-swipe/src/node/locales.ts
+++ b/plugins/features/plugin-photo-swipe/src/node/locales.ts
@@ -50,17 +50,6 @@ export const photoSwipeLocaleInfo: DefaultLocaleInfo<PhotoSwipePluginLocaleData>
         arrowNext: 'Weiter (Pfeil rechts)',
       },
     ],
-    [
-      ['de-AT'],
-      {
-        close: 'Schließen',
-        download: 'Download',
-        fullscreen: 'Toggle fullscreen',
-        zoom: 'Rein / rauszoomen',
-        arrowPrev: 'Zurück (Pfeil links)',
-        arrowNext: 'Weiter (Pfeil rechts)',
-      },
-    ],
     [
       ['vi', 'vi-VN'],
       {
diff --git a/plugins/pwa/plugin-pwa/src/node/locales.ts b/plugins/pwa/plugin-pwa/src/node/locales.ts
index 59360d941f..ff6c669c0c 100644
--- a/plugins/pwa/plugin-pwa/src/node/locales.ts
+++ b/plugins/pwa/plugin-pwa/src/node/locales.ts
@@ -73,23 +73,6 @@ export const pwaLocaleInfo: DefaultLocaleInfo<PwaPluginLocaleData> = [
       update: 'Neue Inhalte sind verfügbar.',
     },
   ],
-  [
-    ['de-AT'],
-    {
-      install: 'Installieren',
-      iOSInstall: "Drucke den Share-Button und dan 'zu Homescreen hinzufügen'",
-      cancel: 'Abbrechen',
-      close: 'Schließen',
-      prevImage: 'Vorheriges Bild',
-      nextImage: 'Nächstes Bild',
-      desc: 'Berschreibung',
-      feature: 'Features',
-      explain:
-        'Diese App kann auf Ihrem PC oder Mobilgerät installiert werden.  Dadurch sieht diese Web-App aus und verhält sich wie jede andere installierte App.  Sie finden sie in Ihren App-Listen und können sie an den Startbildschirm, die Startmenüs oder die Taskleisten anheften.  Diese installierte Web-App kann auch sicher mit anderen Apps und Ihrem Betriebssystem interagieren.',
-      hint: 'Neue Inhalte sind verfügbar.',
-      update: 'Neue Inhalte sind verfügbar.',
-    },
-  ],
   [
     ['vi', 'vi-VN'],
     {
diff --git a/plugins/search/plugin-slimsearch/src/node/locales.ts b/plugins/search/plugin-slimsearch/src/node/locales.ts
index 64bb012ffa..981eebd7fc 100644
--- a/plugins/search/plugin-slimsearch/src/node/locales.ts
+++ b/plugins/search/plugin-slimsearch/src/node/locales.ts
@@ -81,25 +81,6 @@ export const slimsearchLocaleInfo: DefaultLocaleInfo<SlimSearchLocaleData> = [
       loading: 'Suchindex wird geladen...',
     },
   ],
-  [
-    ['de-AT'],
-    {
-      cancel: 'Abbrechen',
-      placeholder: 'Suche',
-      search: 'Suche',
-      searching: 'Suche',
-      defaultTitle: 'Dokumentation',
-      select: 'auswählen',
-      navigate: 'wechseln',
-      autocomplete: 'automatisch vervollständigen',
-      exit: 'schließen',
-      queryHistory: 'Suchverlauf',
-      resultHistory: 'Ergebnisverlauf',
-      emptyHistory: 'Suchverlauf leeren',
-      emptyResult: 'Keine Ergebnisse gefunden',
-      loading: 'Suchindex wird geladen...',
-    },
-  ],
   [
     ['vi', 'vi-VN'],
     {