I want to ask what other peoples opinions on this are before I talk to someone.
I am working in a tiny conference room. There are 8 of us in here. 5 Indian that speak Hindi with each other 24/7, 2 Chinese that speak Chinese 99% of the time between each other, and then there's me. I feel so awkward just being here, everyone talking with each other like they're best friends.
Monday. Elevator. I ask my coworker how her weekend was. "Oh it was alright, just watched some TV, you?" I already know this is a bullshit response.
Her Indian coworker asks her how her weekend was, and then they just go off for like 2 hours between each other in full on Hindi.
That is, how is this different than if one group of people constantly talks about what their fantasy football team is doing, and another constantly talk about celebrity gossip, and you care about neither sports nor celebrities?
The example you gave isn't mutually exclusive - "watched some TV" followed by two hours of discussion might be "watched the Indian equivalent of House of Cards over the weekend and now want to talk about it." You wouldn't have seen it, nor know the relevant political background to make sense of it. Would you spend several hours during work to coach a near stranger on US politics, in order to describe the TV show you just watched?
Speaking of which, how are they able to talk for 2 hours in a small room without distracting anyone else? You're likely exaggerating, but is your frustration that you're feeling lonely/isolated, that the room is too small for the number of people in it, or something else besides just that you don't speak Hindi or Chinese?
Getting HR to force everyone to speak English isn't really going to help anything.