Outgoing and incoming language skills differ, and it’s possible to be skilled in one and not in the other. Being “good with words” is an oversimplification; literacy and verbal articulation are distinct cognitive processes. Discrepancies in skills between the two may be particularly common for autistic people.
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it’s possible for me to be both very literate and not very verbal. I scored highly on comprehension, spelling and vocabulary—which are receptive language skills or the ability to understand and process incoming words. I scored poorly on visual to verbal tasks (translating written words into speech), verbal working memory (remembering and repeating back spoken words) and verbal fluency…
⤷ I Think I Might Be Autistic, Cynthia Kim