Or do the events successfully cater to those who don't speak the local language? And if so I'm assuming English is second main language right?
Another thing I've noticed is that a lot of the European members here speak English really well, is this the case for the general population? I wouldn't know what to expect

I am fluent in Spanish and English BTW, and am proficient with some of the French I learned back in high school (although I really need some refreshing and practice).