Thing you don't consider when marrying a person whose family doesn't speak the same language you do: the mental exhaustion, eight years in, of processing an extended family dinner conversation at speed. Currently taking internet break under the guise of checking on my son...
For specifics, I married a German man, and while I have half-assedly learned German over the last eight years (during which time I also got a Master's degree, started teaching, and had a baby, so I think I can be forgiven for not having mastered a language too) and can largely follow most conversational topics and respond more or less comprehensibly, if not complexly, my vocabulary and grammar are still fairly weak. So I just listened to my husband's flight attendant aunt tell a very long story about a client who lost a gold tag? (an Anhänger, but I can't figure out why you would have one made of gold or why you would care if you lost it) down a seat and she had to spend twenty minutes getting it out because she has small hands. Something about masks and collegiate politics as well, but I didn't really understand that part.