Spell check in Mojave
This is more of a pet peeve, because I am a writer, but the spellcheck in Mojave is terrible. I have the word "seek" in a sentence, and the spell check flags it as if it's the word "eek." It has also flagged "than" where "then" would not be appropriate. This never happened before I updated to Mojave. I don't like computers scolding me for word choice (which shouldn't even be included in spellcheck - that's a grammar issue), but I do like to be able to check my spelling without these glitches. I can't think of any fixes, other than telling it to learn spellings of words that do not exist... which would defeat the purpose of spellcheck.
Using a MacBook Air, 1.8 GHz, 8GB Memory, 121GB storage...
MACBOOK AIR (13-INCH, 2017), macOS Mojave (10.14)