I've been working for this company for a year now - there is around 150 staff on our site and 6 members in our team (we have our own office away from the rest of the company).
All the team are English apart from two of the staff members are from a European country (Don't want to say which country they are from as I know a couple of my team are mumsnetters). The manager is from the same country as them.
The manager "prefers" to use her own native language when talking, so 5% of the time she talks English - the other two girls follow suit and talk in their language to her and to each other.
AIBU to think it's extremely rude to not communicate in English to the whole team?