Mayan language is not detected correctly. Seems that the ISO 639-2 code myn is not supported.
It should be an easy feature to be implemented.
I’d be curious as to how they are maintaining the list of 2 and 3 digit codes for this. I just checked on my test server and confirmed when I changed an external sub I have that is actually English it showed up as unknown once I put ‘myn’ as the language code.
I noticed that there is no 2 digit code for the Mayan languages (639-1) so out of curiosity I looked for other languages with no 2 digit code. I wanted to see if they had the same outcome but the ones that I tried all worked properly, so looks like this language was just missed hopefully.
As you said, I would think this should be an easy enough thing to fix.
-Shark2k