Hi Rob,

No such tool exists yet.  Support for multiple languages is a tricky one because often the content varies by language (graphics, etc.) and some languages generate longer copy text than others.

I do know people have used the course copy functionality in the authoring tool to generate different language versions though.

In terms of importing manually created courses, this is unlikely to happen.  There is other specific meta-data bundled with the authoring tool JSON which is generally not present on manually created courses.

We are planning an import/export of authoring tool courses at some point.  In theory this would allow you to export from the authoring tool, translate the JSON files, then re-import the course.

Regards,

Brian