Although Amazon lists the boxset as "subtitled", it is NOT. If you are HoH or a foreigner who needs subtitles, do not buy the boxset.
The studio (Acorn Media) doesn't care about us and Amazon provides false information. They usually don't provide subtitle information at all, they've become too big to care about such details!
Please note that the individual DVD "To The Manor Born - 25th Anniversary Special" does have subtitles for the HoH. It is produced by a different studio. As usual, Amazon doesn't provide subtitle information!