What's with the Thalys website?

Basically i'm travelling to Europe in January and want to book a return ticket
Amsterdam to Paris on the Thayls train. So, I get on their website (www.thalys.com) and for a start their booking page for such a journey is in Dutch, and than I notably get a message that my attempt at boking failed because I haven't logged in (there is NWOHERE on the site to log in that I can find) or I'm not setup to accept cookies.

Generally speaking has anyone else had this problem with the Thalys website, and if so how did you get around it? I'm sporadically travelling from Australia - can anyone easily suggest how to obtain Thalys ticklets from here? Thanks, all.