Can you use pronouns in scrabble?

No you can't.

AnswerI feel the brevity of this answer possibly misses the point of the person that asked it. PROPER names are generally not included in the OSPD (Official Scrabble Players Dictionary). HOWEVER, when a Word we might usually recognize to be a "people name" has another meaning, it may often be found in the OSPD and, therefore, is allowed.