All translators can mark translations as accepted and add other users to this group. Please see the Quality assurance help page on this feature.
To be productive and effective a translator reviewer preferably you need to:
- understand the feature and plan to work on quality assurance on a language/project;
- be a native speaker of the language;
- have a large number of contributions on translatewiki.net or other software localisation credentials;
- a track of (good) interaction and feedback with other translators on this wiki.