[rachelbythebay]

I latched onto the part of your post about thinking in another language. Way back in school, I had these 90 minute long immersive Spanish classes. You had to speak Spanish the whole time, even for the most ordinary things. It was intended to get you really using the language, and it apparently worked. Here's why.

I eventually realized that for a few minutes after leaving that class, as I walked to my bus, my inner monologue was running in Spanish, too. I might be thinking about the same things, but the words used for them would be different. This would slowly click back over as I started hearing and talking to my fellow students, and I'd be back to normal a few minutes after that.

The thing is, this adaptive behavior isn't limited to extremes like EN vs. ES. There are different subsets of the language which swap in and out of my speech depending on who's around. I speak one way here on HN, for instance, knowing a bit about my potential audience. I wouldn't sound quite like this with random family members, after all.

What I'm guessing based on what you've said here is that this adaptation might not be a universal thing. Maybe some people just have their preferred language and use it no matter what their audience might be. Perhaps other people pick up on this and think they're "weird" since they're not using the common "code" of the rest of the group. Curious.