Difficult? Not really. Unusual though and understandable that someone not versed with the pop-culture idea of ye-olde-english would find confusing. He's supposed to be speaking unnecessarily verbosely while using a non-contemporary lexicon. That's all.
This being obvious when his lines are examined through the lens of another language (likely the source material) are similarly portrayed.
Complaining that he should be simplified and made more understandable is missing the entire point of how he's written though.