Remove `es_ES` language.
Rename `uz_UZ` to `uz_UZ@latin`
Rename `zh_CN` to `zh_HANS`
Rename `zh_TW` to `zh_HANT`
Add support for lowercase chars in `country` part of the locale code
(although in the end it is not needed, since `boost::locale` backend
does not supports lowercase 'country' part in locales identifiers
currently) .
Related to https://projects.blender.org/infrastructure/blender-projects-platform/issues/65
0ce02355c1