How to add a translation on openmultiplayer on github? This is the first time i'm use github and my English not good to understand what this website say me.
Some one can guide me how to do this?

I'm afraid I don't have the time now to do a complete step-by-step guide, however maybe these few lines might be helpful. I am new to GitHub too (but I used Bitbucket), but yesterday I learned how to do this process, and I will now tell you what I did:

1. Create a GitHub account if you don't have one yet
   
2. Fork the openmultiplayer/homepage repository to your own account; to do this, simply click the "Fork" button at the top of the page
   
3. Download a git client. I personally just downloaded the raw command line git bash
   
4. Pull your own fork of the repository to a folder (cd [foldername] and git pull [address]). You can find out the repository address by clicking the "Clone or download" green button in the page of your fork of the repository.
   
5. Add your new files and modify the files to modify (in the case of languages, you need also to edit component/languages.js) in the folder
   
6. Commit the changes (git commit -am "I changed x, y and z")
   
7. Push the commit to your forked online repository (git push [address])
   
8. Sign the Contributor License Agreement
   
9. In the openmultiplayer/homepage repository page, click "New pull request"
   
10. Click "compare across forks"
    
11. Click on the second repository drop down box, and select your fork
    
12. Follow the remaining instructions to merge the changes