We all know about Yoda's iconic Yodaspeak. Like most people, I always assumed that this a cultural or personality trait of Yoda, but on a recent re-watching of The Empire Strikes Back I noticed that during the "Yoda's Hut" scene, in his brief moment of clairvoyance while communing with Ben, Yoda's grammar is proper. I find this both interesting and unsettling. Yes, throughout the series he Yoda-speaks some sentences and not others, but here there is a clear change of expression, change of behaviour, and change of grammar, as if we're getting a glimpse into his former self - and there's no Yoda-speak.
Here is the interesting bit from the "Yoda's Hut" scene, quoted from IMSDb: The Empire Strikes Back
CREATURE Ah, your father. Powerful Jedi was he, powerful Jedi, mmm.
LUKE (a little angry) Oh, come on. How could you know my father? You don't even know who I am. (fed up) Oh, I don't know what I'm doing here. We're wasting our time.
[begin moment of clarity]
CREATURE (irritated) I cannot teach him. The boy has no patience.
BEN'S VOICE He will learn patience.
YODA Hmmm. Much anger in him, like his father.
BEN'S VOICE Was I any different when you taught me?
YODA Hah. He is not ready.
The fact that, in his moment of temporary sanity, he uses proper grammar suggests that the broken sentences are a side-effect of his mind's deterioration from living on Dagobah, rather than a cultural trait. Based on this, you would expect him to talk normally in the prequels.
Have other people noticed this? Are there other explanations of this scene that do not break the character of Yoda?
I am, of course, aware that prequel Canon and many Legends sources establish that Yoda has always spoken Yodish. Fine. My question was more along the lines of "When Lucas sat down to write the prequels and only had ESB and RotJ as sources for Yoda's character, should this scene have been pivotal for the character? (Clearly Lucas chose "No.") The discovery of this scene seems to introduce a conflict between ESB and the prequels."