Error for languages with country code

[MoroseCorpse]

I have the problem that I would like to separate the languages additionally on the basis of the country codes. So e.g. en-US or en_US

However, unfortunately, this does not work. If I use en_US, the messages are loaded, but plurals are ignored.

If I use en-US instead, it doesn't work at all and I only get the key back.

The errors occur both when I load the messages from a JSON file or pass them directly into the code.

[MoroseCorpse]

#3
This is how it works for me now. But I don't know if I broke something else by doing that