Simple i18n with typescript

i18n.ts

const translations = {
  en: {
    searchLable: 'Add to',
    addProduct: 'Add product',
    menuHeader: 'MENU',
    searchHeader: 'SEARCH',
  },
  sv: {
    searchLable: 'Lägg till vara',
    addProduct: 'Lägg till',
    menuHeader: 'MENY',
    searchHeader: 'LÄGG TILL',
  },
};

type TranslationType = typeof translations;
type LanguageKeys = keyof TranslationType;
type TranslationKeys = keyof TranslationType['en'];

const translate = (translations: TranslationType) => (lang: LanguageKeys) => (
  key: TranslationKeys
) => {
  return translations[lang][key];
};

export const t = translate(translations)('sv');