Was thinking about this recently in the context of Yoda in Star Wars. In the original movie he sometimes spoke in what has been dubbed "Yoda speak", e.g. "Speak backwards, I do" but I didn't get the sense that it was the form for the majority of his dialogue. Then it felt like it became a meme and, by the time that the prequels came around, this was the main way that he spoke, to the detriment of his overall character.

Thanks for the magic of internet some amazing person has done the numbers on this: https://buydemocracy.wordpress.com/2015/12/18/yoda-speak-ori...

TLDR; Empire: 22% Yoda Speak. Jedi: 33% Yoda Speak. Phantom Menace: 74% Yoda Speak. He seems to have become very much a caricature of himself during his pop culture hiatus between the movies.

Many thanks for posting this and giving me a name for this phenomenon :).