i18n: exposes languages in grafana/data (#102958)

* i18n: exposes languages in grafana/data

* Chore: updates after PR feedback

packages/grafana-data/src/unstable.ts

@@ -10,4 +10,4 @@
  */
 
 // This is a dummy export so typescript doesn't error importing an "empty module"
-export const unstable = {};
+export { DEFAULT_LANGUAGE, LANGUAGES } from './utils/i18n';

packages/grafana-data/src/utils/i18n.ts

@@ -0,0 +1,54 @@
+const ENGLISH_US = 'en-US';
+const FRENCH_FRANCE = 'fr-FR';
+const SPANISH_SPAIN = 'es-ES';
+const GERMAN_GERMANY = 'de-DE';
+const BRAZILIAN_PORTUGUESE = 'pt-BR';
+const CHINESE_SIMPLIFIED = 'zh-Hans';
+const ITALIAN_ITALY = 'it-IT';
+const JAPANESE_JAPAN = 'ja-JP';
+const INDONESIAN_INDONESIA = 'id-ID';
+const KOREAN_KOREA = 'ko-KR';
+const RUSSIAN_RUSSIA = 'ru-RU';
+const CZECH_CZECHIA = 'cs-CZ';
+const DUTCH_NETHERLANDS = 'nl-NL';
+const HUNGARIAN_HUNGARY = 'hu-HU';
+const PORTUGUESE_PORTUGAL = 'pt-PT';
+const POLISH_POLAND = 'pl-PL';
+const SWEDISH_SWEDEN = 'sv-SE';
+const TURKISH_TURKEY = 'tr-TR';
+const CHINESE_TRADITIONAL = 'zh-Hant';
+
+/**
+ * Default language.
+ */
+export const DEFAULT_LANGUAGE = ENGLISH_US;
+
+interface TranslationDefinition {
+  code: string;
+  name: string;
+}
+
+/**
+ * Supported languages for translation.
+ */
+export const LANGUAGES: TranslationDefinition[] = [
+  { code: ENGLISH_US, name: 'English' },
+  { code: FRENCH_FRANCE, name: 'Français' },
+  { code: SPANISH_SPAIN, name: 'Español' },
+  { code: GERMAN_GERMANY, name: 'Deutsch' },
+  { code: CHINESE_SIMPLIFIED, name: '中文（简体）' },
+  { code: BRAZILIAN_PORTUGUESE, name: 'Português Brasileiro' },
+  { code: CHINESE_TRADITIONAL, name: '中文（繁體）' },
+  { code: ITALIAN_ITALY, name: 'Italiano' },
+  { code: JAPANESE_JAPAN, name: '日本語' },
+  { code: INDONESIAN_INDONESIA, name: 'Bahasa Indonesia' },
+  { code: KOREAN_KOREA, name: '한국어' },
+  { code: RUSSIAN_RUSSIA, name: 'Русский' },
+  { code: CZECH_CZECHIA, name: 'Čeština' },
+  { code: DUTCH_NETHERLANDS, name: 'Nederlands' },
+  { code: HUNGARIAN_HUNGARY, name: 'Magyar' },
+  { code: PORTUGUESE_PORTUGAL, name: 'Português' },
+  { code: POLISH_POLAND, name: 'Polski' },
+  { code: SWEDISH_SWEDEN, name: 'Svenska' },
+  { code: TURKISH_TURKEY, name: 'Türkçe' },
+];