[Translation] Add missing keys

[lozalojo]

Missing keys at en.json file for translation:

[kakaroto]

Thanks, I had planned on doing that... and I just spent the last 3 hours in the most excruciating task of extracting the language strings into the lang/en.json and I didn't finish, I had to give up for my own sanity, but most of the stuff is available now for translation. I'll finish the rest... some other time :(

[lozalojo]

Perfect, I will update mi fork and add new keys