In my profile settings, I can choose my languages. A couple gripes with the web interface of this setting:

• I have to hold down the Ctrl key to select multiple languages. While this was clear to me since I use this keyboard shortcut a lot in other contexts, this would definitely be confusing or unclear for most users.
• This setting should be split into two. As of now, it determines what content you see, with all other content completely hidden...AND it determines what languages will appear in the language selector when making a post or comment. There should be separate settings for which languages are displayed and which appear in the language selector for a new post (because I don't want any content to be hidden, but I want to be able to easily select English for any new comment). Or at least a setting for a default language for new comments.