One tidbit I read is that people who think in a foreign language like me are in some decision processes more-rational [0]. I think I don't get hung up on emotionally-stirring words, or get offended by vulgarities, as they feel more abstract to me than visceral. May be the same mechanism.
[0] https://medicalxpress.com/news/2012-04-foreign-language-peop...
But can you still think in your native language if you try to?
I was born in the USA, a child of immigrants. So I didn't speak English until perhaps 3 or 4 years old.
But I can still think in my native language if I really try.
I speak Russian to parents and my brother, but it often feels like I have a concept I want to articulate and have to use a bunch of non-SAT words to vaguely gesture at what I want to say; or, I simply don't know a word like "easel" in Russian and feel like I'm playing the game "taboo" :P
I think naturally I gravitated out of thinking in Russian since it's too much effort for no payoff. One thing I miss about Russian are all the prefixes you can add to a verb, like "drive over", "drive into", etc are accomplished with short prefixes: "pere-" or "v-". It doesn't sound like much, but when you can apply the dozen-ish prefixes to the word "fuck" you realize the potential English is missing ;)