Heading1 does not convert to Kop1

[boesh]

We have a template, in this template we make use of Heading 1, Heading 2, heading 3, etc.

In the Heardertext we've insert Field StyleRef heading 1. This works as Word is in UK language.

Some have Word set to NL language, but then the headertext says, ERROR, and we have to manually change the Insert Field to Kop1..
This is not wanted when working in groups where different people work with MS-Word in UK and MS-Word in NL.

How can we solve this problem without asking everyone to change MS-Word to UK language?