Maybe redub some of Yoda's lines with a character with "backwards friend" from Star Trek III.
"I'm looking for a great warrior."
"You seek I. Message received. Available ship stands by."
***
"But they're my friends, I have to help them!"
"Oh, Mutara Sector restricted. Take permits many. Money more."
You could continue this dialogue with Luke saying McCoy's lines and swearing, and Yoda saying, "Genesis allowed is not! Is planet forbidden!"