AITA for calling my neighbour a stupid twat after she started shouting at me because of what my daughter said?

Because of my work, I (f37) temporarily moved to the US with my family: my husband, Adrian (m38), and my daughter, Mora (f10). We’re only going to be living here for the next few months so we enrolled our daughter into an international school so she doesn’t have to change her curriculum.

It’s important to note that my husband is Chilean, I am Polish, our daughter is obviously both and she speaks both, Spanish and Polish, as well as English because we normally live in London.

With that out of the way, we moved into our new house a little while ago. Our neighbour has a little girl around Mora’s age and they’ve become friends quickly. I’ve only met the mum a few times but she seemed lovely enough.

Anyway, a few days ago, I was reading a book on my porch when I saw my neighbour, Leah, pulling into her driveway. When she saw me, she motioned at me to wait for her so I put on my flip flops and came over to help carry her groceries while she tells me whatever she wanted to tell me.

She started the conversation normally but then quickly turned into what she heard the girls talking about when they were playing yesterday at her house. And she was “appalled” (her words, not mine). Apparently, the girls were playing with barbies (yes, my 10 year old still plays with them occasionally). So, the appalling thing my daughter did was not call her family dolls grandmother, instead she called them abuela and babcia (hence the mention of Mora’s background earlier) one being Spanish for grandmother, the other Polish, that’s how she calls her grandmothers. And Mora’s new friend asked why and Mora explained it. And as kids, they continued playing.

Leah was distraught at the idea that my child doesn’t call her grandmothers, grandmas or nans or whatever else you’d called them in the US. I tried to politely explain to her our reasoning, but she went on a tangent how I am ruining my daughter’s future with messing up with her head, threatening to call CPS on me (yeah, she really said that) and that I am trying to brainwash her daughter into changing how she calls her grandparents (wtf?).

Anyway, I hate wasting my time on arguments and she clearly wasn’t in the right state of mind. I put the groceries down, told her ‘have a lovely day’ and walked back to my house.

I thought she might realise later what she’s done was wrong but no, she started telling all my new neighbours about the situation and she tried confronting me again. I told her to drop it and mind her own business, but she wouldn’t stop. I eventually called her a stupid twat and told her to never talk to me again. In a twist of event, it seems some of my neighbours think I am the asshole for calling her that. I am confused, I didn’t think calling someone a twat would be much of an issue but here we are. AITA for that?