How to determine with high probability that the text is an incomprehensible set of characters?

Question

Text analysis

Good afternoon.
Interested in any information that will help build an algorithm with a high probability of identifying meaningless character sets.
It is not necessary to analyze the meaning of the text, only the text itself is available for analysis.
Example:
green apples of Petra - ok yvytsuyy
waoaov -
not ok

Answer 1

according to the corpus only, especially if two-word ones,
the more proper names - the larger the corpus