asier2

Format lang-region code for values folders as required by Android. ('es-es' -> 'es-rES') https://developer.android.com/guide/topics/resources/providing-resources#AlternativeResources: > > The language is defined by a two-letter [ISO 639-1](http://www.loc.gov/standards/iso639-2/php/code_list.php) language code, optionally followed by...