Continuing the discussion from Adding Custom Dictionaries to Spellcheck:
Mac user here. Spelling should be controlled by OS to be consistent across applications. I vote to remove Obsidian custom spell checker in the Mac version and use native one.
Creating a new topic linked back to the original feature request of custom dictionaries because I think these are actually different features.
Use case or problem
Consistent, full featured dictionaries in multiple languages provided by the OS.
If the system supports and offers dictionaries Obsidian should use the system one by default.