Internationalization (I18n) API

Rails Internationalization (I18n) API:

, which are traditionally used for separating “languages” and “regional setting” or “dialects”. Many international applications use only the “language” element of a locale such as :cs , :th or :es (for Czech, Thai and Spanish). However, there are also regional differences within different language groups that may be important. For instance, in the :en-US locale you would have $ as a currency symbol, while in :en-GB , you would have £. Nothing stops you from separating regional and other settings in this way: you just have to provide full “English – United Kingdom” locale in a

Full article: http://guides.rubyonrails.org/i18n.html#translations-for-...