I know an old urban legend here at SPS about way back in the early days of ENJJPT.
As you can guess, the whole "language barrier" deal was a hassle and a hard thing for Americans to get used to in the early days of the program. Some American IPs, however, took it in stride.
On a T3 sortie (IP in both cockpits) in the T-38, a couple IPs decided to mess with the RSU. Upon entering the pattern, one IP made all the radio calls in the thickest accent he could in an effort to convince the RSU that they had a language-challenged student in the pattern. To add to the hilarity, the IPs decided to f*ck with the RSU by having the front seater duck down below the canopy rails -- out of sight -- during the final approach/flare. Initial, the break, and the final turn all *look* normal, but, as the jet passes the RSU, the dudes in the container note that there's only one guy in the jet. AND HE'S IN THE BACK SEAT. Oh no!
The RSU gets on the radio to talk to the "foreign pilot," and they explain to him that the T-38 is only flown solo from the front seat.
The reply (in the best broken English the IP can muster): "Oh...ok...I fix, then. No problem."
So the FCP IP gets up and starts flying, while the RCP IP ducks down below the rails...
Next time around, the RSU sees the "foreign pilot" in the front seat now. Confusion and hilarity ensues.
Dunno if it's true, but 10% rule applies, and it's a damn good story...