Microsoft Word will print wide characters in non-english fonts containing extended characters as square boxes. This is because the printer's drivers do not accept Unicode characters. You can try the following registry hack fix the problem for many printers :

Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Office\office version\Word\Options
Name: NoWideTextPrinting
Type: REG_SZ
Value: 1

Microsoft document: Q212380: Characters Appear as Square Boxes in Printed Document

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