I downloaded MakeMKV 1.10.5 (beta).
I found some problems on Italian translation.
I extracted from .gz Italian language file the .mo file.
With Poedit I converted it in .PO file.
I edited the PO file,save it,a nd save it as .MO (new) file.
Then I re-compress the .mo in .gz with same name as original language.
Now if I re-started MakeMKV (after I select from Italian to English GUI, close MakeMKV, re-run MakeMKV change from English to Italian, then restart again MakeMKV) I didn't see the changes in language file.
How can test new language file?