Yes Tony, but that's the same with any system, the 28.2 satellite is not really too good for anything other than Sky, although thaere are afew other channels on there. If you're looking for French channels, get yourself an 80cm dish and a second hand analogue receiver and point at 5W , there are all of the terrestrial French channels there.
It's not widely known, but EuroNews on Sky transmits with several different language soundtracks including French. So you can watch the news in French for free (it won't even cost you a € !). To watch it in French on your Digibox, you need to go into the System Setup menu, select the Language and Subtitles option and set the default language to French. Other channels that only transmit a single language soundtrack will still be in English, Punjabi or whatever.
Rumour has it that TV5, a 'best of' French language TV station, will be joining Sky, so watch this space.