Concerning the issue #158, I put the option to change the language.
I make sure that the --locale option on the command line still work. I put it in "General" below the "Icons theme" and "UI theme".
However, I think there is a little problem (UI problem): for the language in the combobox, I put only the 2 first letters of the language. For example, for "French", I put "fr". I don't know if it's really annoying for 9 languages but it might be annoying if we decide to add more languages.
PS: I only touch general.py, main.py, default.json and lisp.json. Extremely sorry, I open another pull request with wrong manipulation (that's my first time) .
Concerning the issue #158, I put the option to change the language. I make sure that the --locale option on the command line still work. I put it in "General" below the "Icons theme" and "UI theme". However, I think there is a little problem (UI problem): for the language in the combobox, I put only the 2 first letters of the language. For example, for "French", I put "fr". I don't know if it's really annoying for 9 languages but it might be annoying if we decide to add more languages.
PS: I only touch general.py, main.py, default.json and lisp.json. Extremely sorry, I open another pull request with wrong manipulation (that's my first time) .