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You do have a Tools menu unless you have something very wrong with your version of Word.

See Mastering the Spelling Checker.

[Edit]
Try clicking on a misspelled word and pressing Shift+F1. You should see something like this:



Under Font formatting does it say : Language: Do not check spelling or grammar?

The screenshot above is from a computer with only one language installed, with spelling and grammar installed and active. This is a character(font)-level formatting in Word.