Confused talk not to be understood.

难懂的话。

The peculiar expressions of a party, sect, etc; cant; lingo.

术语；行话；暗语。

An incomprehensible language or dialect.

听不懂的语言或方言。

Speech or writing full of long, unfamiliar, or roundabout words or phrases.

冗长晦涩的字辞语句。