[siruva07]

That's a great point.

In that case, I'd suggest the first two letters of the language, an "En" for English, an "Es" for Spanish, a "De" for German, etc.

[ximeng]

https://en.m.wikipedia.org/wiki/List_of_ISO_639-1_codes Not first two letters, two letter ISO codes. There are also complications with dialects, so not quite this simple.