It’s actually not to set your account languages (like the options in your user settings) but to set your post and comment languages, instead of always being “unspecified” by default now it’ picks your prevoius language picked on your last post or comment!

I did not know about it, so I just posted it there! Thanks for the heads up!

Hey, if you want, I have made a Firefox add-on to automayically remember your last selected language in your posts and comments and auto select it next time! Give it a try! It doesn’t really improve much but it’s still something!