Preserve locale variants as private subtags in tags
Preserve locale variants as private subtags in tags

Convert unrecognized language code @variants into private subtags (e.g.
de_DE@formal vs. de-DE-x-formal).

PKRoma/poedit,vslavik/poedit,nawawi/poedit,nawawi/poedit,alexhenrie/poedit,PKRoma/poedit,vslavik/poedit,PKRoma/poedit,nawawi/poedit,PKRoma/poedit,nawawi/poedit,alexhenrie/poedit,nawawi/poedit,alexhenrie/poedit,PKRoma/poedit,vslavik/poedit,vslavik/poedit,alexhenrie/poedit,vslavik/poedit,alexhenrie/poedit