I have the same problem as: Custom dictionary
I want to add a custom main dictionary to RStudio. I copy the .dic and .aff files to %localappdata%\RStudio-Desktop\dictionaries\languages-user, but it is not shown in the dropdown menu for "main dictionary language". Any ideas how I can debug this problem?
The RStudio-version is: 1.3.959 running on Windows 10.