I used this Launcher too, try to find a readme. If you pingaz'd it the same way as I used to, there IS a Readme explaining everything.
But, if I remember correctly, the first one on the left is for the campaign (first is Dead Center, second Dark Carnival, third Swamp Fever, fourth Hard Rain, fifth The Parish), first one on the right is for the levels of the campaigns.
Rest is unnecessary, except "Player". Enter your name there.
Then, most of all, click on the second start button to start. The one in the middle. Otherwise you won't have the console.
And no, there's no translation of this.
/Edit: OHH and, this is not online configuring. This is a launcher, meaning it launches the game for Singleplayer. You're not able to play L4D2 online with this version.