If the imam makes a mistake and the worshippers alert him by saying tasbih, but he does not understand what is intended, is it permissible for the follower to speak?

The questioner:
Honorable Shaykh, may Allah grant you success, he says: Is it permissible, if the imam makes a mistake and is alerted by tasbih but he does not understand what is intended, is it permissible to...

The Shaykh:
...clarify what is intended to him while they are saying tasbih? They have not said tasbih except that he has a mistake. Yes, so if he is not certain of his own correctness, it is not permissible for him to continue; he should return to their words. But if he is certain of his own correctness, he does not return to their words, because certainty is not returned to the words of another. Yes.

The questioner:
Then he says, may Allah preserve you: Is it permissible for the follower to speak words, saying to him "prostrate" or "bow" or something else?

The Shaykh:
What the Messenger (peace and blessings be upon him) guided to is tasbih for men and clapping for women. Yes.