As a non-native working in German, the numbers are one of the trickiest parts.
My jobs generally involve a lot of math and discussions of numbers, and I often struggle with swapping numbers around in my head. Especially because when you get to bigger numbers people often switch between (or use a combination of) listing individual digits left-to-right and saying multi-digit numbers.
The though is when you occasionally notice natives mess it up!
Yeah I have used opensuse for the past couple years (still do!) but while there is plenty to like, if I were to do a reinstall I would likely move back to Fedora.
Then again, I basically never use YaST, which I suppose is one of the main song points.