12/5/2018: I'd recommend revisiting Zendesk's review capabilities, which allow us to assign articles for review by setting workflow states of Ready for review, Approved for publishing, and Flagged translations. This will keep commenting and review within Zendesk, as well as ensure that English updates are tracked for Spanish translation in their companion articles.
In our current configuration, the Zendesk Guide Help Centers don't have a good review and editing workflow. Most people at edX don't have access to articles before they are published, and they can't make review comments within Zendesk. Using GitHub can provide a better review and editing workflow, at some cost in clunkiness. Here is an outline of a GitHub-based workflow for creating new Zendesk Help Center articles.
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