Don't use country code in translation file names if not necessary

Please rename files in po/ to not have the country code included, e.g. from de_DE to just de. There should be a translation per language which is valid for all countries. If there is a need to override some of those translations based on a country, there should be an additional translation file for that. Translations with country codes are only shown if you have exactly that locale. For example, in my case, I have the locale de_AT. I don't see any German translations, just English. If there would be a translation without country appended, I would see the German translations. The same is true for cs_CZ, hu_HU, it_IT (for example not shown to a locale it_CH), nb_NO, pt_PT.

Translation files for GNOME are also named like this, see for example https://gitlab.gnome.org/GNOME/gtk/tree/master/po

The only language that always has a country code included is Chinese, zh_CN and zh_TW in this case. For the current Devede translations there should be no country code included with only 3 exceptions: pt_BR, zh_CN and zh_TW.