An advanced search tool lets you describe your perfect language partner.
I like Lingo Globe because the search function is extremely easy to use.
Once you find a user, you can see all the details they chose when they made their account, such as the languages they need to learn.
Once you've found someone on Conversation Exchange that fits your requirements, you can add them as a contact and send them a private message to get all the details sorted out about how you’ll communicate.
The Mixxer works by having you build a simple user account defining the languages you speak and the ones you want to learn.
If you can't find what you're looking for in a language exchange website, or you'd like additional training, maybe you'd be better off learning on your own.