Since I now write my papers in Quarto using Rstudio, I need German spellchecking. I installed additional dictionaries as outlined here - everything is where it should be (i.e. in ~/.config/rstudio/dictionaries/languages-system/, I use a MacBook).
Additionally, I set up a custom dictionary with words specific for my fields of research and purposes.
However, I get a lot of misspelling indications, particularly (if not exclusively?) for words containing umlaute like ä - ü - ö. Even very common words are not recognised. Sometimes strange replacements are suggested, i.e. häufig -> häufig. To me this indicates some sort problem related to formatting of characters in the dictionaries.
I already reset Rstudio desktop state as outlined here (it was suggested in relation to another problem with dictionaries in Rstudio in this thread) - no change.
Has anyone a solution for this problem or experienced something similar?
I just did, what you recommended: deleted .rstudio-desktop (there was no .config/RStudio). No change.
Regarding, if my doc is UTF-8:
I don't know if this is necessary, since it was greated with RStudio (actual built). The check it, I open my quarto doc in BBEdit, where it is displayed to be UTF-8.
I suppose this is not or does not cause the problem, since on my other MacBook at work I don't have the problem outlined above. Only to be sure that there is no issue with RStudio on the MacBook where the problem occurs, I completely uninstalled RStudio (including the .config and .local/share folders and all other files stored on this machine using CleanMyMac), re-installed and made a completely new setup - no change.