You cannot insert an English cross-reference into a document by using a localized version of Office Word 2007

KB Article: https://support.microsoft.com/kb/2533394

INTRODUCTION

Consider the following scenario:

• You install a localized version of Microsoft Office Word 2007 or a Multilingual User Interface Pack (MUI) for Office Word 2007.
• You set the Office Word 2007 user interface language to a language other than English in the Microsoft Office Language Settings 2007 dialog box.
• You create a document in Office Word 2007.
• You insert an English cross-reference in the document.

In this scenario, the text for the cross-reference displays in the user interface language instead of English.