There's also: Let me outside and let me inside. My mistake was putting the food bowl beside the back door so I have to guess which one it is, food or out.
Well, with my cat in the childhood the translation was easy. Two meows (probably learned from "mama" = mom) meant that the cat wants attention from my mother. A single long meow meant that the cat wants to walk outside (well, this was specifically trained by meowing at the cat at appropriate times). A short meow meant either food or play, depending on the room where the cat is in.
I'm not the parent commentator but I understood them to do it before they let the cat out.
I'm pretty sure that's pretty normal for training behavior, until you step up the training and stop letting the cat out unless it meows correctly
