If you're thinking of playing Classic, yes, if you just require an answer so that you're able to leave, the game, you're free to play casually and I would argue to the end that Classic is going to be the most casually game to date with absolutely no barrier to access to the five man heroics when you get to and, if you've enjoyed and fought through the entire game, you'll probably already have...
Arabic
French
Spanish
Portuguese
Deutsch
Turkish
Dutch
Italiano
Russian
Romaian
Portuguese (Brazil)
Greek