Each element of the SUMO site interface that is text, but not the help content itself - all the buttons and navigation links. The text of each such element is a "string".
We currently have two servers for SUMO:
The strings you translate are regularly transferred to the testing and production servers, where you can see them in action.
UI strings for SUMO are localized in a variety of tools:
If you are a Reviewer in Pontoon, you will occasionally have to approve strings suggested by others. To do so: