You don't need Taifun Tools to create your multi-language app however as indicated in the description of the extension, you might use one or both of these Blocks to select the language the app could 'automatically' set the Labels/Buttons to to discover the Android device current language and select the language file you want based on the language codes provided by his tool.
His Country Block returns the country/region code of the current Locale, which should either be the empty string, an uppercase ISO 3166 2-letter code, or a UN M.49 3-digit code.
A Locale object represents a specific geographical, political, or cultural region.
His Language Block returns the language code of the current Locale.
A Locale object represents a specific geographical, political, or cultural region.
as described. It doesn't do anything unless you supply the Block code and use it with a List or Dictionary that supplies the language of the device with the appropriate language from your available 'language' schemes.