Emails & Documents localization

When sending for example quotes to Norwegian (or other nationality) clients (which has been set up correctly with Norwegian as default language for user interface and emails), the email is in Norwegian, but the system template (quote, in this case) is in English.

Further, when sending out a job request to a Norwegian vendor, the email language is English even though the Vendor is registrated with Norwegian as default. Why is this happening?

It depends on the template localization in the Client's profile.

To set it correctly all at once,  firtst select all Norwegian vendors:

Then select them and use Multiple Change option.

It the templates section set all the templates to the norwegian ones. It obviously works for all active templates.