The use of a spell checker is largely useless if the word used, however correctly spelled, is incorrect in the first instance.
Being dyslexic, some posts make no sense, as the simple misuse of a word – 'there, their, the're' for instance, used in the wrong context, completely alters the meaning of the sentence.
And yes I used 'Spelled' allegedly the American English version of the word, as 'Spelt' to me means a type of corn flour.
Over the years I have had to learn 'type speak' and interpret it by using several re-reads in some cases. Nowadays, 'Text speak' is even worse, as in ' C@ s@ on H@ now H@ Fl@ M8', and don't lets start on L33t 5p3ak.
Rather than use a spell checker, try a Thesaurus, which will not only show the correct word to use, but how to spell it correctly.
Regards