This topic lists the full set of DBT templates. Generally speaking, there is a template for each different language. Sometimes, however, there are multiple templates for a single language, and sometimes separate templates to accommodate technical notation and math translation, textbook production, etc.
As regards importing XML documents, the common XML (Daisy-NISO) styles have been incorporated into the "Basic" templates. Therefore, most templates can be used to work with XML files.
Click on a template name to learn more about what that DBT template does.