This reminds me of a pet peeve of mine with most i18n implementations. In English it's customary to have month names capitalized as proper names, but in Portuguese they're like any other word. But apps will often end up with fully lowercase month names, even in titles or beginning of sentences
This is of course because since the English names are already capitalized, devs don't remember to explicitly capitalize the whole sentence programmatically, and the i18n implementation is not smart enough to produce the right capitalization contextually. Even Apple Calendar is guilty of this!
Every now and then my work computer's Office suite will decide to proof in French and it'll start showing spelling errors for perfectly kerffoled word.