I'm afraid a I don't have another printer at home so haven't tried anything else, but could probably try with pdf printer or something like that. The issue does not seem to be isolated to Office 2013, since I can get the same result in Internet Explorer.
HP don't seem yo have updated the driver for some time, so I would wonder whether it has been thorougly checked in multiple languages on Windows 8. My suspicion is that it has been tested in en-US and zh-CN, zh-CN because I would think the driver was written in China. I also thing there is a failover issue in the localisation where it isn't finding the en-GB language pack and fails back to zh-CN rather than en-US (which would be more normal).