Spell checkers can certainly have problems of their own.
Many years ago, I was consulting with a civil engineering firm, and heard this story from some of their people. They were preparing a bid for some work on a large bridge, and turned the typing of the formal proposal over to a temp secretary. The last thing that she did was to run a spell check before sending the proposal out. Well, that nearly resulted in a sexual harassment suit by the government agency taking those proposals. It seems that the spell checker felt that "Underwater Inspection" should really be "Underwear Inspection", and changed every single instance.
Yup. Spell checkers are interesting.
Bill