It's been my experience that when you party with JP players that speak very limited English they will say stuff like "hurry" and "gogogo" just to let you know that they are paying attention but they are usually not able to understand you very much at all. I think sometimes it might be children that are allowed to play when main player is no longer on, cuz the player goes from SHARP AS NAILS to lleaAAAuuuuUUU.
In all fairness, JP players know what they're doin 90% of the time.