Customizing the Proofing Language of the Export Documents
It is possible (since version 7.7) to customize the proofing-language of the documents. By default all languages are in English however that can be changed by creating a custom template and changing proofing language there as documented on Change Proofing Language in Word
For example if you want to export content in German, then:
• Create a copy of the default template.
• Open the copy template in Word, select all text, and change the proofing language as documented here
• Save the template and use it for German language exports.