This new auto spelling highlighter can't spell!

I don't know when it first appeared but for the last week or so I've noticed an auto spell check that underlines words that are spelt incorrectly.

Only, the spell check itself cannot spell.

Most ironically it misspells 'spelt' and for some reason it thinks 'favourite' is spelt wrong.

So it thinks there are too incorrect spellings in the sentence above.

But it didn't pick up the incorrect use of 'too' in the sentence above, where it should clearly be 'two'.

Also if I talk about a jail sentance it thinks I've spelt sentence wrong which I haven't in this particular instance of course.

I think we need a spell checker that can actually spell! Don't attempt to educate me when you're wrong you thick as shit probably American spell check you!!