I tried like to add slovak dictionary for Spell Checker doing these steps:
1, dowloaded sk_SK.dic from: https://github.com/LibreOffice/dictionaries/tree/master/sk_SK
2, added sk_SK.dic file to Custom Dictionaries in Editor > Spelling
3, restarted Rubymine
The spell checker is still underlining slovak word and regards them as typos.
Can you please help?