Not sure how long.
But the 40% discount works.
The discount code is on the line below the "Redeem offere/voucher" - you just click on it and it drops into the code box and hey presto 40% off.
They have english on the site, but not when it gets to credit card check out
Still it wasn't too hard to work it out.
I really liked their stuff when it first came out, but it had got expensive - however 40% puts it back in the acceptable area.