Equating a programming language named after a Russian island to Hitler is a real stretch, unless you think that everything Russian is like Hitler. It's just an island and a language named after it.
That doesn't quite work—Pearl Harbor was a US base, so most Americans would be okay with it. The negative associations we have with it are what was done to it & the people who served there. We're not angry or upset about the base itself.
I think I wouldn't necessarily put that I use Hitler on my CV, due to the negative feedback I would receive from others not in the field.
But on the other hand, barely anyone in the United States has even heard of the island Kotlin, so I'd feel more comfortable doing that.
But Kotlin IS NOT equivalent to Hitler AT ALL, Kotlin is like if you named your programming language "Texas" and somebody objected to the name, because "there are defence contractors located in Texas".