Android localization values-** folder names

Question

I have seen several conflicting tables that show localizations and what names they should take

A lot of them suggest that there are versions of the language for each

Answer 1

all can find in https://developer.android.com/index.html

1. in https://developer.android.com/guide/topics/resources/providing-resources.html#AlternativeResources

the page descript multiple resouce define, like drawable , value

2. in https://developer.android.com/training/basics/supporting-devices/languages.html

the page provide Language res define， it‘s import How Create Locale Directories and Resource Files .

the format is -b+[+].

and the language code country code reference https://developer.android.com/reference/java/util/Locale.html

language ISO 639 alpha-2 or alpha-3 language code, or registered language subtags up to 8 alpha letters (for future enhancements). When a language has both an alpha-2 code and an alpha-3 code, the alpha-2 code must be used. You can find a full list of valid language codes in the IANA Language Subtag Registry (search for "Type: language"). https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry

country (region) ISO 3166 alpha-2 country code or UN M.49 numeric-3 area code. You can find a full list of valid country and region codes in the IANA Language Subtag Registry (search for "Type: region").

https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry

Other reference： https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2