Translations:Localisation Sidebar/10/en

You can see the difference between the two by looking at the top of the translate box where the name of the variable is displayed. When the variable name ends with "-target", it means that you will be translating a target link. It's made to allow the translator to redirect the items to the translated pages, that is, by adding a language code at the end of the page name, for example, "/fr" for a French translation.