Just take anyone who speaks a second language and ask them to explain their expertise in the second language. Almost everyone will start sounding stupid trying to do the translation in their head to the second language.
Edit: Just to be clear, I don’t think said person is stupid at all. There’s just difficulty speaking about a concept you would innately know and have learned in one language and translate it to a second one. Except for all those genius polyglots out there of course.
This was such a nostalgia trip. Thanks.