Theme Horse

Dear Theme Horse Support Team,

I like your Attitude theme so much that I decided to use it on my 3 sites (legjobbpercdijak.hu, bestrates.hu and bestetarife.eu).
The Hungarian version is already done (legjobbpercdijak.hu). But I do not know how to connect the 3 sites with a language flag link on header or at the slogan part of it.

Can you help me how to do it?