Hi
For QR interviews, you have to go to Qatar, though I believe they provide specially discounted flights. They will, I am told, carry out an initial interview over the phone and only if you pass that will you be flown out to Doha.
The need to speak a second language isn't really an issue with Qatar. Like Emirates, they recruit crew from all over the world and try and have as many languages spoken on each flight as possible. If you CAN speak another language, excellent, but if not it shouldn't be a problem.
While I have heard that they aren't the best of employers, I think that Qatar would be a great airline to join! Doha is tipped to be the Dubai of the future and Qatar's growth is going to be huge. Join now, get in on the bottom floor, and you could be able to take advantage of said growth.
Best of luck to you.