Presentation (in German) about OpenRailwayMap at GPN (Gulaschprogrammiernacht).
I know you are mentioning it’s in German in the comment, but how about using the properly language setting as well?
When you submit a post or comment, there is a selection box to indicate what language it is. People can choose what language they do understand to filter out content they can not / are not interested in seeing. OP has selected “English” as the language of a post that is clearly in German.
I would guess they are upset they engaged with a german language post when they set their account to show only their, presumably english, language.
I speak German just fine. It’s for other people. What’s the point of having a language setting if people are just going to stick “English” there?