Hello,
The current version of phpdocx doesn't support getting a translate OOXMLResources file based on the document language.
The best approach is changing the variables of the OOXMLResources class. You don't need to change the class, as all variables are public static you can overwrite the values dynamically from any other script:
OOXMLResources::$pageNumber = '..';
so you can create a script that changes the value of this variable based on your needs.
Regards.