Before all of you pound me into pulp, I will admit to not using a spelling checker all the time myself. Guess it comes under the heading of "arrogant norteamericano".
If you will "GOOGLE" for WORD WEB" you can get an interactive spelling checker FOR FREE and use it to check the words you aren't sure of.
The English language is probably one of the hardest in the world to learn and use properly. On top of that, there are MANY words that sound the same, but are spelled differently and have entirely different meanings. Then there is that propencity of some people just learning a new language "by ear" to "drop" certain sounds which aren't present in their native language.
Thus the use of a spelling checker would go a long way toward correcting the misuse/misspelling of common words when writing on these and other pages.
Just a friendly note of advise. I know that no one wishes to be called "dumb" because they don't spell correctly in a non-mother tounge.

It depends how much time I have, if I’m in a hurry, I don’t use a spell check. With a little bit of time
Why not?

I normally don't use a spellchecker. I do that in order to avoid relying on something that I might not always have in hand. Anyways, if I don't know how to write something I google it instead of writting something funny and risk being laughed on