Language Coordinators are primarily responsible for handling team join requests for a particular language, and managing who's involved in that language.
They are the must trusted members of the community and are in constant contact with staff. They can also answer basic questions from the community and help onboard and train new reviewers and translators.
The Coordinator can always promote Localizers to another role once they have demonstrated more experience.
Reviewers can both translate and mark a translation as reviewed. These community members are experts in their language. Their role is to make sure translations meet certain quality and consistency standards.
Translators are responsible for translating all content from English to their language, keeping Waze standards and consistency. This content varies from on-going translations to time sensitive requests.