Q: The spell checker seems to accept anything I type. It never finds mistakes, even if I purposely misspell a word. What's wrong?
A: Are you typing the descriptions in all caps?
There seems to be a never-ending variety of all-caps organizations: ABA, DEA, FBI, NRA, NAACP, MPAA, etc. We avoid trying to keep up with all of them by accepting any "word" consisting of upper-case letters and nothing else.
The spell checker will reject combinations of letters and numerals, such as PG13. (If you are referring to the film rating, it should be PG-13.)
You can easily see if the spell checker is working. Create a new fee transaction and type some words in the description (not all caps!), including a few errors. Click the Check button. That will check the transaction on the screen.