Thread:Project:Support desk/How to create two language mediawikis?

I want to setup a two lingual mediawiki but I am not sure how to act. At this moment I have two databases and two subdomains, each with a mediawiki install on it:

subdomain 1: English MediaWiki with its own database. subdomain 2: Dutch MediaWiki with its own database.

How must I proceed to let these two MediaWikis communicate with each other? The result that I want is that when you are on the English version you can go to related articles in Dutch and vice versa.

Thank you in advance for responding :-)