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.
As a native french speaker, I have the same feeling when reading code written with french keywords, except that since I learned boolean and arithmetic in french, it makes more sense to me to read them in french. As others have pointed out, it seems to only be a matter of how you learn to read and write code.
For comparison, in mathematics I learned to read all the symbols in french, and only learned their english equivalent much later, so it feels uneasy for me when i read their english version. So it is clearly a matter of habit that took its root when you learned reading.
Startup culture?