I want to add my language (Icelandic) to RStudio. I followed tthe instructions here: https://support.rstudio.com/hc/en-us/articles/200551916-Spelling-Dictionaries
The files I need are here: https://cgit.freedesktop.org/libreoffice/dictionaries/tree/is and I've put them in the right folder, i.e. %localappdata%\RStudio-Desktop\dictionaries\languages-user
I then navigated to this folder and added the .dic file as shown in the screenshot
What else do I need to to? RStudio is still marking common Icelandic words as misspelled and the suggestion is obviously English words, not Icelandic.