You guys are over thinking this. Most linebackers will tell you that you can pick up what a team is running based on splits, body language, and have an understanding of their tendencies when it comes to the run game.
Cici is laughing in part because Disco is a stupid dumby call which he realized after the fact. The calls almost always have a L or R in the name like CiCi said.
If they really wanted to do a dumby call the L / R should have been based on places vs everything else
Louisiana, Lauderdale, Lincoln, New York, Richmond, etc Real Call to signal direction
Oklahoma, Oregon = outside zone
Indiana, Idaho = inside zone
Leader, leopard, rhino, rizzler - Fake call.
Orca, otter, iguana ~ fake calls.
Then at halftime you switch it up where places become fake call and animals / everything else becomes real.
QB comes to line with center and calls out Louisiana Otter, Leader, Oregon = outside zone Left