I was also confused. At first, I thought maybe the raws had it written down as early English to try to match the time period or something. But as I read more chapters, it literally made my head hurt just looking at it because even though the words/phrases they said had similar meanings or you understood the intended meaning, it felt like they weren't using the words right. When they said "I comprehend," it felt like I was looking at an incomplete sentence and I was literally looking for the ending of it.
Character: "I comprehend."
Me: "Okay? Comprehend what? You gonna finish the sentence, buddy?"

wtf is the translation bruh