In this case, equivalence over 'M' leads to the concept of a recognizable language.

It bit me, quite hard, and cursed at me in an almost recognizable language.

They don't have any recognizable language; screams and squeals are their only way of communication.

Now, here was something that didn't use recognizable language, but nevertheless told me a story, and did it through amazing spectacle.

"Now, that's sensible," said Keating; he felt at home in recognizable language.

Robot' is an old word from no recognizable language, though our scholars say it bears the connotation of 'work.

I flicked my eyes, noting a few pictographs here and there, but nothing in a recognizable language.

For the above definition of automata the recognizable languages are regular languages.

For different definitions of automata, the recognizable languages are different.

This notion is different from the notion of recognizable language.