My first language is English, same as OH. MIL's first language is something else (let's call this X) but she also speaks English. OH's whole family speaks both X and English.
OK, so every time MIL sees DD she chats away in language X. This makes me upset. I'm not afraid of DD learning X at the age of 4 months, but when I go back to work when she's 9 months, MIL will be her full-time carer. I don't want DD learning language X. Frankly, it makes me feel jealous and isolated that DD will be speaking and understanding something that I don't speak and understand.
Not a big deal? Well, add to this the fact that we will all be moving into the in-laws' house when I go back to work, for childcare purposes. It'll be a big happy family-in-law all chatting away in language X, all of the time. This usually happens when we visit, and I cope with it, but it breaks my heart that DD might be chatting with them and I wouldn't be able to understand even my own daughter.
I want to ask MIL to speak to DD only in English, as this would be fairer on everyone as everyone speaks English. And also because I'm her mother for F's sake AIBU?