What is a saledictorian?

Answer 1

It appears to be a misspelling of salutatorian.

From Wikipedia:

Salutatorian is an academic title given, in the Philippines, United States and Canada, to the second highest graduate of the entire graduating class of an educational institution. Only the valedictorian is ranked higher. This honor is traditionally based on grade point average (GPA) and number of credits taken, but consideration may also be given to other factors such as extracurricular activities. The title comes from the salutatorian's traditional role as the first speaker at a graduation ceremony, delivering the salutation (where the valedictorian, on the other hand, speaks last, delivering the valediction).[1]

Looks like the misspelling came from a combination of the words valedictorian and salutatorian, which are pronounced similarly.