My experience of spelling words is quite visual (in contrast to my normal thinking style, which suggests that if "thinking styles" exist they are not monolithic), I literally have the visual representation of the word floating in my head. (I can tell it really is visual because I can give details, such as what kind of font - serif - or what color - black - they are the words as they'd appear in a book.)

I'd also describe my spelling skill as "automatic", i.e. I can usually instantly spot whether a word is "right" or "not right", I absolutely cannot stand misspellings (including mine, I have the hardest time when writing fast because I must instantly go back and correct any typos, rather than let them be), and they tend to leap out of the page; most people appear to have an ability to ignore typos that I lack. (For instance, I often get a kick out of spotting typos on the freakin' front page of national magazines, and when I point them out I mostly get blank stares or "Oh, you're right" - people just don't notice!)

I'd self-describe as adept at language.

(ETA: upvoted for a luminous question.)