see e.g. this thread:
How would you apply the spell checker?
Have you filled the field LANGUAGE? Otherwise: how should one know which language it is? Not every track is in English.
Where would you apply the spell checking? Names? Probably pointless. Titles? OK, could be a target. Which reminds me of the 70s band Slade who had a number of tracks out that deliberately spelled not like Queen's English.
(Cheap 'N' Nasty Luv, Coz I luv you, Cum on feel the noize, Gudbuy T'Jane etc.)
Which would then lead to an awful lot of exceptions just to find the few typos where it really would make a difference.
And this would still not find all the "there/their/they're" and "it's/its".
I do not think that the forum software has a spell checker but that this is a setting in your browser.