Facebook needs help:
Hello Jose, do you speak English (UK)?
Help translate Facebook into English (UK) so that it can be used by people all over the world, in all languages.
Click on the Translate Facebook button to add the Translations application, developed by Facebook, so that you can be part of the community of translators.
[Checkbox] I wish to participate in Facebook's language translation project and I agree to the Additional Terms Applicable to Translate Facebook
My answer was going to be yes, until I read the Additional Terms:
Terms Applicable to Translate Facebook
The Translate Facebook application collects translations, comments, suggestions, ideas, feedback and other information ("Submissions") from you and other users in connection with Facebook's language translation project to provide access to Facebook and applications and websites that use Facebook's platform in multiple languages (the "Project").
You understand that your participation in the Project is for the benefit of the Facebook user community as it will allow users whose participation is currently limited by language to more fully participate. You acknowledge that your participation in the Project is entirely voluntary, and you understand that no monetary or other compensation will be given to persons, including you, for Submissions. You may provide as much or as little input into the Project as you wish and can cease contributing to the Project at any time.
In consideration of Facebook's permitting you to participate in the Project and the benefits to the Facebook user community of which you are a member, you acknowledge and agree that any Submissions that you provide to Facebook will be owned by Facebook. Accordingly, you irrevocably assign to Facebook all right, title and interest, including all intellectual property rights, in and to all Submissions, and Facebook is entitled to the unrestricted use and dissemination of these Submissions for any purpose, commercial or otherwise, without acknowledgment, consent or monetary or other tangible compensation to you. To the extent that the foregoing assignment is or becomes invalid or unenforceable to any degree or for any reason, you grant Facebook an irrevocable, perpetual, exclusive, fully-paid-up, royalty-free, worldwide right and license, with the right to sublicense, to use, reproduce, display, perform, create derivative works of, distribute and otherwise exploit the Submissions in any manner.
In other words, by helping Facebook you are giving your soul for free to Facebook. Ok, I think it does not pay.