nani itteru ka zenzenwakaranai 何言ってるか全然わからない [I] have no idea what [he] is saying.
doragon shauto deookee... ドラゴン語でおｋ･･･ With dragon shout [it] is OK. (literally.) Can you say that again in dragon language?
Here, shauto シャウト is a gikun for go 語, "language."
This is a reference to a meme.
nihongo de ok 日本語でおｋ With Japanese language, it's ok.
Which normally would be used if someone is speaking English or Greek or something, and a Japanese native that doesn't understand those languages would rather have them speak in Japanese.
From there, the meme is used when someone is saying stuff that you can't understand, full of jargon, so it sounds like a different language to you.
