macOS spell checker has a problem
I added a custom spelling dictionary (.aff, .dic) for the Armenian language because macOS doesn't have one by default.
Enabled in the settings and restarted the computer. Spell checker only checks words longer than 10.
I have tested same dictionary with Hunspell, it work perfectly.
Problem is not new, it have on my all devices and friends devices too. Now I am using MacBook pro M2 with Ventura 13.2.1.
I have several Armenian dictionaries to test. For example, you can try this: https://github.com/titoBouzout/Dictionaries
MacBook Pro Apple Silicon