i have just tried to receord "the disney channels" as it has an english soundtrack and it worked ok.
so i think it depends on how your TDT receiver is linked to you VCR, which is the important bit.
ideally you need the TV scart from your TDT receiver into the EXT2 in your VCR, then your EXT1 on your VCR to the TV.
Then you select the language on your TDT receiver, then record EXT2.
hope this helps....