He leads her downstairs and into a classroom on the ground floor. It's full of early reader books and translation dictionaries- she might be able to find one with her language in it somewhere, although whatever... probably African thing she's speaking, if it isn't fake gibberish, is unlikely to be represented here.

There's a picture of Gloria with her class- he shows it to her and points to the stick figure drawing he made previously.

But how to explain that she teaches language...?

He points at her papers with the columns of translations- pointing rapidly between pairs of words, and at the picture. "Gloria... teach... English."