Tells the matcher to take accent-errors and keyboard-errors into account.
An accent error is a non matching accent on a letter. E.g. when someone searched for "pâte" but actually meant to find "pâté" (which is pretty delicious french food btw) A keyboard error is, when some wanted to type a "J" and instead typed a "K". Those two are directly beneath each other on your standard QWERTY/QWERTZ keyboard.