code: public static String resolve( String lang ) {
  
  		String result;
  		if( ! LANGUAGES.contains( lang ))
  			result = EN;
  		else
  			result = lang;
  
  		return result;
  	}
docs: Resolves a language to a supported translation.
  @param lang a string (e.g. "en_EN")
  @return a supported language