I did three in class at the same time...Greek, Hebrew, and Russian, though only one of those was spoken. But I learned Ukrainian on my own at the same time. So, I guess four? And I did fine.

Right now, back in the States from Ukraine, I'm working on Hindi, Japanese, and Indonesian, in preparation for a trip to Asia. I don't think I'll take a language in school again. If you're self-motivated, school is the worst way to learn a language, because the class adopts (at least somewhat) to the students who have a lot of trouble, or don't even try. A very small class might be an exception...

__________________
Pete
Missionary
The Free Presbyterian Church
I'm often in different countries...
but my home base is Pennsylvania