Despite the fact that these cute twin twins have been together since birth, they still have a lot to say to one other—in their secret language.

Merle and Stijn were captured on camera enjoying a lovely private talk.

Their father, Roy Johannink of the Netherlands, captured the beautiful incident.

Even though the two babies were not exactly talking to each other, they made constant eye contact and exchanged babbles that only they could understand

They grimaced and giggled during the chat at one point, which piqued the parents’ interest!

What do you think these cute babies were talking about?

Watch the adorable clip here and listen for yourself if you can decode their secret babbling.