If you select it and then continue to the regular Brandsaver site to select more coupons, you can click "English" near the top right of the screen. When I chose a few more Bransaver coupons and then completed my order, all of the coupons listed were in English (including the Cascade). I received it the other day and it did print in English.
If you do end up with a French coupon, you should still be able to use it at Walmart. I've never had a problem using a French coupon at any store even though the cashiers I've used them with did not speak French. It's a little harder because it's a BOGO, but worst case, in a big store like Walmart there must be someone who knows enough French to read the coupon :)