Add latin for language as an option in dictionaries

[rimugu]

I have created my own dictionary for latin language (my first one, not too good yet), but upon adding it, I have to select for which language it is, and latin is not an option (for now, I have added it as spanish united states).

It would be good to have an option to have the dictionary appear in heliboard as its own language "Latin".

I understand it would not be used a lot, but I use it for my duolingo latin language clases. There may be others that benefit from it too.

[rimugu]

Other option like layout, etc. To make it easier for now, it could copy all like in Italian.