Recently someone in one of his dreams told him a poem in an unintelligible language.

Sometimes, even speech in an unintelligible foreign language can be illuminating.

The words of the songs are in a largely unintelligible language, although some sailor terms can be distinguished.

But how can it make sense that a nearly unintelligible language can explain the physical world?

He peered at her as if she were an alien speaking an unintelligible language.

Harry realized that he had listened to an unintelligible language.

We have dealt with jargon in the sense of confused unintelligible language.

We have no need for unintelligible language in this matter.

Two miles further on, he pointed out of the window again at a field of cows, saying something in his unintelligible language.

In an unintelligible language, he mumbled into a hand radio, then he moved on.