Integrating two fabric networks with different language for chaincode.

Hey guys, I have a scenario which I need some light on:
Let's say I have a fabric network with organisations and few different channels setup, all running the go chaincode.
I also have a second fabric network with it's own organisations and channels setup, all running java chaincode.

Now, Down the future these two networks need to be integrated with each other. So, let's say,  I'd setup a new network with one node from each as a participating peer. But the original chaincodes are written in go and java respectively.
Is there anyway that we can use the chaincode written already or the only way to integrate the two networks is to  have them settle on which language the chaincode should be in and have one of them rewrite all the code or use something like Hyperledger Quilt