Does "Mightn't" modal using is available on Question Tags?

[Osmanlı Sefîri]

As a Turkish learner, I've already been studying "Question Tags" subject and i saw an explanation about this subject.
"Mightn't word using doesn't allow in English"
so i've researched ( I asked to GPT ) and gpt said shortly :
This using allowed in English but mayn't didn't. In english, using mightn't instead of may not. Might is tag of the May modal.
So i've puzzled. So I wonder if a native english speaker might help me?

This is an example of this subject :
is "They may be late, Mayn't they?" sentence true?

 

[SoothingDave]

No, don't use "mightn't" or "mayn't."

 

[Osmanlı Sefîri]

No, don't use "mightn't" or "mayn't."

Thanks for your reply master.

 

[Amigos4]

You will find “mayn’t” and “mightn’t” in dictionaries but these contractions are rarely used in modern AmE or BrE and are considered old-fashioned.

 

[emsr2d2]

I use "mightn't".

Cathy, to me and a friend (Helen): Are you two going to the pagan fair on Saturday?
Me (looking at Helen): We might, mightn't we? We'll probably decide on Saturday morning.

 

[emsr2d2]

"Mightn't word using doesn't allow in English"

Where exactly did you see this completely incorrect sentence? I don't mean the content - I mean that the sentence itself is grammatically terrible!

 

[jutfrank]

I use mightn't too, in exactly the same way as emsr2d2, and it's not old-fashioned to us. Still, I strongly agree with SoothingDave that the OP should not use it.

 

[Osmanlı Sefîri]

Where exactly did you see this completely incorrect sentence? I don't mean the content - I mean that the sentence itself is grammatically terrible!

I wrote it myself. I tried to see how much I could write without using a translation or if I could express my thoughts but I didn't copy in GPT. I wrote it based on GPT.

 

[Osmanlı Sefîri]

I extend my warmest greetings and thanks to everyone who responded. I understand that it exists in British usage, but even though it's in the dictionary, it doesn't exist in everyday American usage. Thank you very much. SoothingDave amigos4 emsr2d2 and Jutfrank