Also, I can look at the spelling of a word once and remember it forever, even if it is in my second language (French).
That happens with most English words that I encounter(English is my 2nd language).
Is this hyper-sensitivity to word/language structure nuance an ISFP thing? An SP thing? Or just an S thing? OR NOT?!
It can be most likely an S thing. Don't S go into details? With that, they can remember things like spelling..especially for the dominant Sensors..an example is my youngest brother, who can babble on and on(w/o stopping) the details of how his online war game went on.
I do have one friend who is an ISFP and she works with me. Our type of job is VERY much about proofreading - she is quite good at the job and has become a trainer now after doing this job for several years.
Be kind, for everyone you meet is fighting a hard battle. ~Plato