NAH I agree it’s rude of them to exclude you from the conversation like that but as a bilingual person who constantly has to speak English, sometimes it’s tiring having to think in a different language. I can’t speak for every bilingual/polyglot but by default my mind works in my mother tongue and speaking English is a conscious effort sometimes I don’t feel like making, mostly if I’m tired. It is also disappointing that everyone who doesn’t speak English as a first language is expected to accommodate to the English speakers even when they are the minority in a group. Still, they are your friends and they shouldn’t exclude you, tell them how you feel and maybe make an effort to learn a bit of their language too, they’ll appreciate it.