From Wikibabel

Wikibabel is, and will remain, free for anyone to use. What does it mean?

Free as in free beer

You don't need to pay anything to use the website. There is no advertising either.

Free as in free speech

Anyone is free to edit the content of the website, and use according to the Creative Commons Attribution-Share Alike 3.0 license. The details of what it means can be found on their website, but in short, you are free to copy, edit, improve or reuse any content on this website, providing that you maintain a compatible license for your content, and mention the source of your content.

By contrast, most language websites have a copyright policy that forbids doing anything with the content without the author's consent.

How do you make money then?

Right now, the website is funded by its founder, as the cost is very limited. As the site grows, we hope to rely on donations to maintain the website up and running.