The team in SWE that’s responsible for this feature is basically totally checked out and this is very apparent from how bad this is. On iOS the built in dictionaries are missing some very common words and probably hasn’t been updated for ages to include common tech terms and acronyms. All this is true for macOS as well as the code and data is shared.
A great example of AIML can make things much worse for users when every engineer wants to get something on the resume and is trying to get promoted or increase comp. Epic fail.