Do you call your in-laws mom and dad?

I call my in-laws mom and dad.

I don't think this is general, but my ex husband's parents insisted on their first names even for the grandchildren. That spread to my own Mum and Dad but we made our kids call them Grandma and pa.

I called my in-laws by their name, this is what is more common in our country.

Nay and tay or english mom and dad...

Yes you can call them mum or dad. Here in my country that is what we do.

its also same in India .. they call and dad ... but some also call them uncle and aunty ....

It's probably in Asian culture to call someone older with respectable title. Like Mom, Dad, Uncle, Aunt. You call them by their name, you'll probably going to be smack for being rude I remember a Malaysian Youtuber told a story of how he shocked his future wife's uncle by calling him uncle. It's polite for Malaysian, but a bit weird for American.

Yes I do call them mom and dad in Vietnamese.

This depends on the relationship. I do not cal my father in law , step in laws or mother in law mom or dad. Why because they are not my parents. I do call them by there first name which is respectful. Most of the time we call them by what the kids call them. Some of my in laws call me there daughter or niece or even granddaughter and they is totally up to them it doesn’t bother me if they say oh this is my daughter in law or she is married to my son or grandson. In the South of the US most children even when married call there in laws mom dad, sibling, or aunt or uncle.

some call their own parents by their first names when they're older.

I never could call them mom and dad, because they weren't my parents. I called them by their first names sometimes or nothing at all.

I called them by their name.

Here no one call elders with names, guess this is popular in west only

Mom and pa that's i call them.