First of all, you have to be the first official translator!

If you're the one, you just have to :

1) Click on Manage my translations  in the Main Menu-> Web Translation  System on the left side, then pick the extension you wish and click on its title.

2) At the top of the page containing the files of your localization you should see the Change status to "testing/QA" link .

3) Once you have clicked on the link and therefore set the status in testing/QA, you have to open again the page containing the list of locale files, then you should see -always at the top of the page- the Change status to "Released" link .

4) Now you have only to click on the link and therefore set the status in Released, that's all!

Note: you have to be logged in order to access to the Web Translation System

 

For more information, please see the other Questions & Answers