This page is for people with administrator access.
You must have administrator access to turn off spell checking for quizzes in a course.
Gear > Config Variable Browser > Tools > Quizzing > ShowSpellCheckInAttempts > Add Value
For “Org Unit ID,” use the number that appears in the course URL. (CRN won’t work.) If you don’t know the ID number, you can click “Select Org Unit” to search by course name.
Change the value to “off” and save.