Could never put words on it but things don’t feel so real either.
The funniest part is now I speak my native language with my small kids and have fully relapsed to my original home town accent. I had abolished that accent years ago to avoid getting bullied at high school after relocating to a big city.
My kids are actively hearing and speaking 4 languages and one is with a thick accent!
Did you mean to say your partner doesn't speak your native language, or how does that work?
Sometimes I translate in my head what I just said back to my native language and realise that chances are I wouldn't have said it if I had to actually say it in my native language.
It's weird. It's also not something I think about on a daily basis. It's simply how it works.
However: I am kind of a different person when I speak English. My personality changes. Not for the worse though (and that's where I don't agree with the "and not in a nicer way", that's not how it is for me).
The problem is that, as a non-native speaker, the words carry less emotional weight somehow than my native language. This is not specific to English, and it's not because of a lack of familiarity. It's most visible in swear words - I have no problem saying any swear word in English, while I still get slightly squeamish with certain swear words in my native language.
It's basically a part of how you can't really absorb certain cultural aspects of a language, even if you learn about them. They're never going to be a part of your own internal culture if you didn't grow up with them.
I've said for a few years now my personality is slightly different when I speak English. I have a partner of several years that doesn't speak my language nor me hers and we communicate in English and even simple things like expressing affection feel different even after a decade.
At some point since I speak more English every day than my own language when I switched to "thinking in English" (not on purpose) I remember feeling very sad, having almost lost a part of me, and I spent some time trying to think what impact it was having on my own actions and behaviors.
Nothing major, but I am more assertive and outspoken in English than in my native language because things don't feel so "real" to say, so it's easier to not feel scared.
I feel very strange sharing this because when I tried I got strange looks but maybe someone recognizes themselves in this too.