Is there a secret language that only two people can understand??

There is a secret language that only two people can speak. Let us say the secret language is spoken by Adam and Bill, but here's the twist. Adam and Bill would have to be twins (fraternal or identical) for this to happen naturally. Of course, two people could create a new secret language from scratch, but it wouldn't be natural. What I am trying to tell is that there is a secret language that only twins can understand. Like have you ever spoken to a set of twins, but when one of them said something that only the other twin understood? This secret language is fully developed in twins who have made no contact with the outside world from the day they were born. Like these twins speak a different language.

So, what about the twins who have made contact with the outside world?

Turns out that the speed of talking is something that remains with them after speaking in a secret language for 4-5 years. Scientists tell us that all twins talk with almost the same speed and tone. This is why we feel that twins have way too many inside jokes. But, it was never inside jokes it was just a language we normal people didn't understand.

So does this language have a name?

Well, it does have a name. It's Cryptophasia. Crypto here means secret, and phasia means language. So the literal translation from greek to English is a secret language.

The next time you meet a set of twins tell them about cryptophasia: the secret language of twins.