> if you truly did think in the language you speak, how could this situation happen?

As far as how it happens to me is concerned, either something closer to speech than raw thoughts reports back the data in shared memory is invalid for selected language, or I find there's no text representation exist for what I am trying to say.

The "raw" thoughts work with the currently active language, for me, so at least for me, I just know strong Sapir-Whorf hypothesis is not even a hypothesis, but just a reasonable verbalization closely matching my own observations.

I don't get why people can't take it, even in the age of LLMs. It is what it is and that old guy is just never correct even for once.