My favorite argument with my husband is word pronounciation.
Husband: "What's for dinner?"
Me: "Salmon (with the "L" pronounced)."
Husband: "Sa-min. Say it with me, Sa-min."
Me: "Like Caramel? There are two a's and an e in Caramel. So you pronounce them."
Husband: "No, you don't. It's Caramel (he pronounces it as Carmul, I have no idea why)."
Me: "Whatever. You say it the wrong way, I say it the way it's spelled."
More discussion about how to pronounce the word "Salmon", including my stating that Worcestershire sauce can be pronounced with all the letters since we do not spell British English but American English.
Finally, I throw up my hands and tell him to pronounce "Wash".
Husband: "It's Wash. (pronounced Warsh)"
Sometimes, to prove the point further, I ask him to say the word "Water".
Husband: "It's Water (pronounced Warter)! What's your point?"
I walk away, knowing I win my argument.
These are the arguments we have in my bilingual, bicultural household. I have to wonder whether others have such arguments.