Context Navigation

Changes between Initial Version and Version 1 of Ticket #15677, comment 4

initial	v1
3	3	e.g., `$lang_codes['pt']` is now split into `$lang_codes['pt_PT']` and `$lang_codes['pt_BR']`. There are some similar changes with other languages as well.
4	4
5		The could bite a plugin that's calling `format_code_lang()` directly, or using the `lang_codes` filter, since the input/output wouldn't always match what they're expecting anymore.
	5	That could bite a plugin that's calling `format_code_lang()` directly, or using the `lang_codes` filter, since the input/output wouldn't always match what they're expecting anymore.
6	6
7	7	One inelegant solution would be to go through all the codes one by one, determine which ones have changed, and add duplicate entries for them in the array. That would be kind of lame, though, so I'm hoping someone has a better idea.