This isn't just great for international founders, it's great for anyone in YC!
As an international founder, the two things I took away in my batch were: 1) How to deal with visa issues - which can be gruelling + take time and money. That being said, just being associated with YC helps you out a lot. They can recommend great lawyers and alumni who've gone through similar experiences. 2) If you have a non-english sounding accent, pg is likely gonna scream at you when you try to pitch. It's kinda weird, but try not to let it get you down.