Module:Lang/name to tag/doc

This module creates language name (key) to language tag (value) support tables used by Module:Lang:

• rev_lang_name_table – data from Module:Language/name/data particularly the lang table which is assembled from data in Module:Language/data/wp languages, Module:Language/data/ISO 639-3, and Module:Language/data/iana languages.
• rev_lang_data – data from Module:Lang/data particularly the override table.

These reversed data tables are loaded and used by _tag_from_name().