1. Play the lute to a cow: a metaphor for being reasonable to unreasonable people and elegant to those who don't understand beauty. It is also used to satirize people who talk without looking at the object.
2. Chickens and ducks talk: Literally, chickens and ducks talk, and the language is unreasonable. It describes two people who can't speak the same language and can't communicate.
3. It is illogical to describe the communication between two people or communication through different channels.
4. I don't know what to say: it describes that the listener or reader can't hear clearly and is at a loss.
5. Lovers talk more than half a sentence: it describes that two people disagree in the process of communication and it is difficult to continue the dialogue.
6. Disagree: describe two or more people who insist on their own views and find it difficult to reach a consensus.
7. wasting your breath: describing a lot, but all in vain.
8. Aimless: Describe words or actions that have no specific goals and pertinence.
9. Misconduct: describe the behavior or action as unreasonable or inappropriate.
10. Cow chews peony: It describes that there is no purpose in doing or talking, and there is no focus.
The above are some common sayings or idioms that describe the difficulty of communication between two people, and you can choose the application according to the specific context.