diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e40cbc00..cb3d919d6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Updated Keycloak to 26.3.2
+- Added Latvian, Portuguese (Brazil), Russian, Ukrainian and Chinese (Taiwan) translation
 
 ## [1.4.3](https://github.com/cryptomator/hub/compare/1.4.2...1.4.3)
 
diff --git a/backend/src/main/resources/org/cryptomator/hub/flyway/V20__Support_Regionalized_Translations.sql b/backend/src/main/resources/org/cryptomator/hub/flyway/V20__Support_Regionalized_Translations.sql
new file mode 100644
index 000000000..a8353865f
--- /dev/null
+++ b/backend/src/main/resources/org/cryptomator/hub/flyway/V20__Support_Regionalized_Translations.sql
@@ -0,0 +1,9 @@
+ALTER TABLE "user_details" ALTER COLUMN "language" TYPE VARCHAR;
+
+UPDATE "user_details" SET "language" = 'de-DE' WHERE "language" = 'de';
+UPDATE "user_details" SET "language" = 'en-US' WHERE "language" = 'en';
+UPDATE "user_details" SET "language" = 'fr-FR' WHERE "language" = 'fr';
+UPDATE "user_details" SET "language" = 'it-IT' WHERE "language" = 'it';
+UPDATE "user_details" SET "language" = 'nl-NL' WHERE "language" = 'nl';
+UPDATE "user_details" SET "language" = 'pt-PT' WHERE "language" = 'pt';
+UPDATE "user_details" SET "language" = 'tr-TR' WHERE "language" = 'tr';
diff --git a/frontend/src/components/AdminSettings.vue b/frontend/src/components/AdminSettings.vue
index b3526a7a4..fb4430da1 100644
--- a/frontend/src/components/AdminSettings.vue
+++ b/frontend/src/components/AdminSettings.vue
@@ -276,7 +276,6 @@ import backend, { BillingDto, VersionDto } from '../common/backend';
 import config, { absFrontendBaseURL } from '../common/config';
 import { FetchUpdateError, LatestVersionDto, updateChecker } from '../common/updatecheck';
 import { debounce } from '../common/util';
-import { Locale } from '../i18n/index';
 import FetchError from './FetchError.vue';
 
 const { t, d, locale, fallbackLocale } = useI18n({ useScope: 'global' });
@@ -389,10 +388,7 @@ async function fetchData() {
 
 function manageSubscription() {
   const returnUrl = `${absFrontendBaseURL}admin`;
-  const supportedLanguages = [Locale.EN, Locale.DE];
-  const supportedLanguagePathComponents = Object.fromEntries(supportedLanguages.map(lang => [lang, lang == Locale.EN ? '' : `${lang}/`]));
-  const languagePathComponent = supportedLanguagePathComponents[(locale.value as string).split('-')[0]] ?? supportedLanguagePathComponents[fallbackLocale.value as string] ?? '';
-  window.open(`https://cryptomator.org/${languagePathComponent}hub/billing/?hub_id=${admin.value?.hubId}&return_url=${encodeURIComponent(returnUrl)}`, '_self');
+  window.open(`https://cryptomator.org/hub/billing/?hub_id=${admin.value?.hubId}&return_url=${encodeURIComponent(returnUrl)}`, '_self');
 }
 
 async function saveWebOfTrust() {
diff --git a/frontend/src/i18n/en-US.json b/frontend/src/i18n/en-US.json
index 61aa9e95c..7fe07922b 100644
--- a/frontend/src/i18n/en-US.json
+++ b/frontend/src/i18n/en-US.json
@@ -1,12 +1,17 @@
 {
-  "locale.en": "English",
-  "locale.de": "German",
-  "locale.fr": "French",
-  "locale.it": "Italian",
-  "locale.ko": "Korean",
-  "locale.nl": "Dutch",
-  "locale.pt": "Portuguese",
-  "locale.tr": "Turkish",
+  "locale.en-US": "English",
+  "locale.de-DE": "German",
+  "locale.fr-FR": "French",
+  "locale.it-IT": "Italian",
+  "locale.ko-KR": "Korean",
+  "locale.lv-LV": "Latvian",
+  "locale.nl-NL": "Dutch",
+  "locale.pt-BR": "Portuguese (Brazil)",
+  "locale.pt-PT": "Portuguese",
+  "locale.ru-RU": "Russian",
+  "locale.tr-TR": "Turkish",
+  "locale.uk-UA": "Ukrainian",
+  "locale.zh-TW": "Chinese (Taiwan)",
 
   "common.add": "Add",
   "common.apply": "Apply",
diff --git a/frontend/src/i18n/index.ts b/frontend/src/i18n/index.ts
index d2648b6b0..a93068045 100644
--- a/frontend/src/i18n/index.ts
+++ b/frontend/src/i18n/index.ts
@@ -1,36 +1,50 @@
 import { I18nOptions } from 'vue-i18n';
-import de from './de-DE.json';
-import en from './en-US.json';
-import fr from './fr-FR.json';
-import it from './it-IT.json';
-import ko from './ko-KR.json';
-import nl from './nl-NL.json';
-import pt from './pt-PT.json';
-import tr from './tr-TR.json';
+import deDe from './de-DE.json';
+import enUs from './en-US.json';
+import frFr from './fr-FR.json';
+import itIt from './it-IT.json';
+import koKr from './ko-KR.json';
+import lvLv from './lv-LV.json';
+import nlNl from './nl-NL.json';
+import ptBr from './pt-BR.json';
+import ptPt from './pt-PT.json';
+import ruRu from './ru-RU.json';
+import trTr from './tr-TR.json';
+import uaUa from './uk-UA.json';
+import zhTw from './zh-TW.json';
 
 import { createI18n } from 'vue-i18n';
 
-// ISO 639‑1 two letter code
 export enum Locale {
-  EN = 'en',
-  DE = 'de',
-  FR = 'fr',
-  IT = 'it',
-  KO = 'ko',
-  NL = 'nl',
-  PT = 'pt',
-  TR = 'tr'
+  EN_US = 'en-US',
+  DE_DE = 'de-DE',
+  FR_FR = 'fr-FR',
+  IT_IT = 'it-IT',
+  KO_KR = 'ko-KR',
+  LV_LV = 'lv-LV',
+  NL_NL = 'nl-NL',
+  PT_BR = 'pt-BR',
+  PT_PT = 'pt-PT',
+  RU_RU = 'ru-RU',
+  TR_TR = 'tr-TR',
+  UK_UA = 'uk-UA',
+  ZH_TW = 'zh-TW',
 }
 
 export const messages = {
-  [Locale.EN]: en,
-  [Locale.DE]: de,
-  [Locale.FR]: fr,
-  [Locale.IT]: it,
-  [Locale.KO]: ko,
-  [Locale.NL]: nl,
-  [Locale.PT]: pt,
-  [Locale.TR]: tr
+  [Locale.EN_US]: enUs,
+  [Locale.DE_DE]: deDe,
+  [Locale.FR_FR]: frFr,
+  [Locale.IT_IT]: itIt,
+  [Locale.KO_KR]: koKr,
+  [Locale.LV_LV]: lvLv,
+  [Locale.NL_NL]: nlNl,
+  [Locale.PT_BR]: ptBr,
+  [Locale.PT_PT]: ptPt,
+  [Locale.RU_RU]: ruRu,
+  [Locale.TR_TR]: trTr,
+  [Locale.UK_UA]: uaUa,
+  [Locale.ZH_TW]: zhTw
 };
 
 const defaultShortDatetimeFormat = {
@@ -50,14 +64,19 @@ const defaultShortDatetimeFormat = {
 } as const;
 
 export const datetimeFormats: I18nOptions['datetimeFormats'] = {
-  [Locale.EN]: defaultShortDatetimeFormat,
-  [Locale.DE]: defaultShortDatetimeFormat,
-  [Locale.FR]: defaultShortDatetimeFormat,
-  [Locale.IT]: defaultShortDatetimeFormat,
-  [Locale.KO]: defaultShortDatetimeFormat,
-  [Locale.NL]: defaultShortDatetimeFormat,
-  [Locale.PT]: defaultShortDatetimeFormat,
-  [Locale.TR]: defaultShortDatetimeFormat
+  [Locale.EN_US]: defaultShortDatetimeFormat,
+  [Locale.DE_DE]: defaultShortDatetimeFormat,
+  [Locale.FR_FR]: defaultShortDatetimeFormat,
+  [Locale.IT_IT]: defaultShortDatetimeFormat,
+  [Locale.KO_KR]: defaultShortDatetimeFormat,
+  [Locale.LV_LV]: defaultShortDatetimeFormat,
+  [Locale.NL_NL]: defaultShortDatetimeFormat,
+  [Locale.PT_BR]: defaultShortDatetimeFormat,
+  [Locale.PT_PT]: defaultShortDatetimeFormat,
+  [Locale.RU_RU]: defaultShortDatetimeFormat,
+  [Locale.TR_TR]: defaultShortDatetimeFormat,
+  [Locale.UK_UA]: defaultShortDatetimeFormat,
+  [Locale.ZH_TW]: defaultShortDatetimeFormat,
 };
 
 const defaultNumberFormat = {
@@ -68,24 +87,29 @@ const defaultNumberFormat = {
 } as const;
 
 export const numberFormats: I18nOptions['numberFormats'] = {
-  [Locale.EN]: defaultNumberFormat,
-  [Locale.DE]: defaultNumberFormat,
-  [Locale.FR]: defaultNumberFormat,
-  [Locale.IT]: defaultNumberFormat,
-  [Locale.KO]: defaultNumberFormat,
-  [Locale.NL]: defaultNumberFormat,
-  [Locale.PT]: defaultNumberFormat,
-  [Locale.TR]: defaultNumberFormat
+  [Locale.EN_US]: defaultNumberFormat,
+  [Locale.DE_DE]: defaultNumberFormat,
+  [Locale.FR_FR]: defaultNumberFormat,
+  [Locale.IT_IT]: defaultNumberFormat,
+  [Locale.KO_KR]: defaultNumberFormat,
+  [Locale.LV_LV]: defaultNumberFormat,
+  [Locale.NL_NL]: defaultNumberFormat,
+  [Locale.PT_BR]: defaultNumberFormat,
+  [Locale.PT_PT]: defaultNumberFormat,
+  [Locale.RU_RU]: defaultNumberFormat,
+  [Locale.TR_TR]: defaultNumberFormat,
+  [Locale.UK_UA]: defaultNumberFormat,
+  [Locale.ZH_TW]: defaultNumberFormat
 };
 
 export const mapToLocale = (local: string): Locale =>
   (Object.values(Locale) as string[]).includes(local)
     ? (local as Locale)
-    : Locale.EN;
+    : Locale.EN_US;
 
 const i18n = createI18n({
   locale: navigator.language,
-  fallbackLocale: Locale.EN,
+  fallbackLocale: Locale.EN_US,
   messages,
   datetimeFormats,
   numberFormats,