Choose your game from the list and put it into the shopping cart. English language versions are labeled with "EN", oviously.
After your purchase you will receive an automatic mail. This mail contains your personal link to the game. Share the link with all your team so you can open it and play together.
Usually it takes just a few minutes until you receive the mail. In doubt please also check your spam folder - because you never know, right? Please be patient if it takes longer. In the evening hours servers might be busy. To be sure, best buy your game ahead of time when planning your game night. Thank you!