I was watching an interview (English audio, Arabic interpreter) once and I noticed the interpreter was getting quite a few things wrong, I thought it was funny until about halfway through when things got really messed up and I realized the interpreter was messing up things on purpose (it was an infamous political figure speaking). It ended up on the news the next day and the people who messed up the interview lost a lot of credibility, it was a really stupid move and I have no idea why they thought they could pull it off, I mean we have basic English as part of our public education system.