switch to posix strings for language internal

web/projects/shared/src/i18n/dictionaries/en.ts

@@ -56,7 +56,7 @@ export const ENGLISH = {
   'Beginning shutdown': 57,
   'Add': 58,
   'Ok': 59,
-  'french': 60,
+  'fr_FR': 60,
   'This value cannot be changed once set': 61,
   'Continue': 62,
   'Click or drop file here': 63,
@@ -462,10 +462,10 @@ export const ENGLISH = {
   'StartOS UI': 485,
   'WiFi': 486,
   'Documentation': 487, // as in, a website to view documentation
-  'spanish': 488,
-  'polish': 489,
-  'german': 490,
-  'english': 491,
+  'es_ES': 488,
+  'pl_PL': 489,
+  'de_DE': 490,
+  'en_US': 491,
   'Start Menu': 492,
   'Install Progress': 493,
   'Downloading': 494,
@@ -670,9 +670,9 @@ export const ENGLISH = {
   'Preserve': 706,
   'Overwrite': 707,
   'Unlock': 708,
-  'Drive': 709, // as in, a storage device
+  'Drive': 709, // the noun, a storage device
   'Transfer': 710, // the verb
   'The list is empty': 711,
   'Restart now': 712,
   'Later': 713, // as in, (do it) later
-} as const
+} as Record<any, any>

web/projects/shared/src/i18n/i18n.providers.ts

@@ -6,7 +6,7 @@ import {
   TuiLanguageSwitcherService,
 } from '@taiga-ui/i18n'
 import { ENGLISH } from './dictionaries/en'
-import { i18nService } from './i18n.service'
+import { i18nService, Languages } from './i18n.service'
 
 export type i18nKey = keyof typeof ENGLISH
 export type i18n = Record<(typeof ENGLISH)[i18nKey], string>
@@ -20,7 +20,7 @@ export const I18N_LOADER = new InjectionToken<
 >('')
 
 export const I18N_STORAGE = new InjectionToken<
-  (lang: TuiLanguageName) => Promise<void>
+  (lang: Languages) => Promise<void>
 >('', {
   factory: () => () => Promise.resolve(),
 })

web/projects/shared/src/i18n/i18n.service.ts

@@ -2,6 +2,20 @@ import { inject, Injectable, signal } from '@angular/core'
 import { TuiLanguageName, TuiLanguageSwitcherService } from '@taiga-ui/i18n'
 import { I18N, I18N_LOADER, I18N_STORAGE } from './i18n.providers'
 
+export const languages = ['en_US', 'es_ES', 'de_DE', 'fr_FR', 'pl_PL'] as const
+export type Languages = (typeof languages)[number]
+
+/**
+ * Maps POSIX locale strings to TUI language names
+ */
+export const LANGUAGE_TO_TUI: Record<Languages, TuiLanguageName> = {
+  en_US: 'english',
+  es_ES: 'spanish',
+  de_DE: 'german',
+  fr_FR: 'french',
+  pl_PL: 'polish',
+}
+
 @Injectable({
   providedIn: 'root',
 })
@@ -12,20 +26,32 @@ export class i18nService extends TuiLanguageSwitcherService {
 
   readonly loading = signal(false)
 
-  override setLanguage(language: TuiLanguageName = 'english'): void {
+  /**
+   * Current language as POSIX locale string
+   */
+  get lang(): Languages {
+    return (
+      (Object.entries(LANGUAGE_TO_TUI).find(
+        ([, tui]) => tui === this.language,
+      )?.[0] as Languages) || 'en_US'
+    )
+  }
+
+  setLang(language: Languages = 'en_US'): void {
+    const tuiLang = LANGUAGE_TO_TUI[language]
     const current = this.language
 
-    super.setLanguage(language)
+    super.setLanguage(tuiLang)
     this.loading.set(true)
 
-    if (current === language) {
-      this.i18nLoader(language).then(value => {
+    if (current === tuiLang) {
+      this.i18nLoader(tuiLang).then(value => {
         this.i18n.set(value)
         this.loading.set(false)
       })
     } else {
       this.store(language).then(() =>
-        this.i18nLoader(language).then(value => {
+        this.i18nLoader(tuiLang).then(value => {
           this.i18n.set(value)
           this.loading.set(false)
         }),
@@ -33,12 +59,3 @@ export class i18nService extends TuiLanguageSwitcherService {
     }
   }
 }
-
-export const languages = [
-  'english',
-  'spanish',
-  'polish',
-  'german',
-  'french',
-] as const
-export type Languages = (typeof languages)[number]

web/projects/shared/src/util/languages.ts

@@ -18,22 +18,22 @@ export interface Language {
  * Available languages with their metadata
  */
 export const LANGUAGES: Language[] = [
-  { code: 'en', name: 'english', nativeName: 'English' },
-  { code: 'es', name: 'spanish', nativeName: 'Español' },
-  { code: 'de', name: 'german', nativeName: 'Deutsch' },
-  { code: 'fr', name: 'french', nativeName: 'Français' },
-  { code: 'pl', name: 'polish', nativeName: 'Polski' },
+  { code: 'en', name: 'en_US', nativeName: 'English' },
+  { code: 'es', name: 'es_ES', nativeName: 'Español' },
+  { code: 'de', name: 'de_DE', nativeName: 'Deutsch' },
+  { code: 'fr', name: 'fr_FR', nativeName: 'Français' },
+  { code: 'pl', name: 'pl_PL', nativeName: 'Polski' },
 ]
 
 /**
- * Maps i18n language names to ISO language codes
+ * Maps POSIX locale strings to ISO language codes
  */
 export const LANGUAGE_TO_CODE: Record<Languages, LanguageCode> = {
-  english: 'en',
-  spanish: 'es',
-  german: 'de',
-  french: 'fr',
-  polish: 'pl',
+  en_US: 'en',
+  es_ES: 'es',
+  de_DE: 'de',
+  fr_FR: 'fr',
+  pl_PL: 'pl',
 }
 
 /**