As a native french speaker, I feel so uneasy reading source code in french. It feels very very uncanny. I've often wondered if English native speakers feel the same when reading normal source code which is always in English. They probably don't. But how? I've always associated the "other language-ness" to correctness and technicality. It must be so weird to code in your own language. Feels like reading bad pseudo code. It's very nice to be able to map "english" to "technical, correct" and "native language" to "descriptive, approximate, comments, pseudo-code". Having only a single language to work with is like removing a color from the rainbow.
The closest I've ever felt to this as a native English speaker is reading words in music scores in English. I'm a classically trained cellist, and grew up learning notation with Italian and French words for directions and expression. I've never learned either of those languages, save the words used in music notation. Seeing a score with those words in English just feels... wrong. Not in any big way, but as you said: uncanny. Definitely get the "bad psuedocode" vibe, because to me it English in music notation feels similar -- like the person who wrote it didn't know what they were doing, even though the notation makes perfect sense and the music is good. It removes some of the flair of the art of the notation itself for me.