Language Preference Setting

(Original title: There is no language setting and we should have one)

I very much prefer to have my programs in english, or their native language should I understand that, but I came across the issue that I don't see any language selection setting anywhere in the Windows client (at least), and for me that sucks. I managed to solve the problem by quite literally going into the programs folders and destroying the language files for my country, but this is very much a rough solution not everyone, especially "normal people" are willing to do. If Jami is to grow further, simple settings like this should be there in the first place. Adding a language setting will make for a notable improvement in user experience (which is how apps get all the people in the first place), and will let people just flip a switch should they be unhappy with the translation to their language. That is all.