AITA for telling my MIL her grandparent name cannot be “Mama”

I grew up calling my grandfather’s wife Mommom. She was, in fact, my Mom’s Step-mom but she played a “mom” role heavily in both of our lives. So she deserved that. Maybe that could be an alternative and still satisfy your MIL in the situation.

I'm just curious, is she Hispanic? And are there other grandchildren already calling her this?
I do get that it's a so close to a special title, especially since it's most babies 1st or 2nd word. Then grandma would be excited baby said her name😕
My kids have a Nana on their step dad's side, there dad's mom and my mom are simply grandma...
I like the idea of being called meemaw someday, like on Young Sheldon though🥰

It is a Hispanic family but there are two other (step)grandkids who call her grandma which makes it feel a bit more strange

I wouldn’t like that and would also tell her to choose something else

I think it's best if mama is reserved for mom and mom only!

You’re not wrong

So as a mom I understand why you wouldn’t like that , however I remember when my brother was little (I was 13) me and my mom were raising him cause my dad was working abroad and he used to call me “mamma baci” which translated from Italian is mommy kisses which luckily my mom thought it was quite cute. Maybe have a discussion with her , either way the kid will know the difference with his actual mom and will make that distinction obvious❤️

I understand that it’s a Hispanic thing but I’m Hispanic and I wouldn’t like that at all. I’ve seen it within friends but I wouldn’t personally allow that. Just talk to your partner about it to get an idea the level of importance your MIL has to be called exactly that.