"Please refrain from further commentary. I believe you may have inadvertently made a statement that could be regretted. Could you clarify your intentions?"
Here's why:
* "Stop your babbling already!" is extremely informal and rude.
* "I think stuck foot in mouth" is slang and grammatically incorrect.
* "fear you have said something will regret" is grammatically awkward and lacks clarity.
* "What are about?" is informal and incomplete.
The rewritten sentence is:
* Formal and polite: It uses respectful language and avoids accusatory phrasing.
* Clear and concise: It expresses the speaker's concern about the listener's words and asks for clarification in a direct, but non-confrontational way.
* Grammatically correct: It uses proper sentence structure and punctuation.