It's the subtle way... I'm not trying to put anyone on blast, but I'm gonna. Fuck it. Ok, for instance, I was at a meetup with JocktheMotie and I had just come from speaking mandarin with a tennis partner. So at the meetup, it took me a little while to start thinking again in English. I butchered a few words and he casually corrected me. But in a subtle way. Like if I asked "can you help me with my xzy?", he would repeat it back to me like "oh, you need help with your xyz, sure, I can help you!" I don't think he even noticed it. It was so funny and adorable that I deliberately butchered at least 5 more words just to see, and I wasn't disappointed. This seems to be my experience with those of the INTP persuasion.
But yeah, those who speak multiple languages are usually more tolerant, as a whole.