@Paul ******
Incorrect, they've always wanted THB, not USD. They make a 15-20% cut from their own scam conversion when you pay in THB. Thats why they historically will tell you the THB price and make it difficult if you argue with USD. Unless pristine condition, they don't take it. But as I told Tod, they now will say the USD price from the get go. So paying with THB no longer make sense. As for Laos Kip, its unavailable in Thailand. It's a dead currency. So unless you still have some from a previous trip, forget it.
No confusion. Nobody call that border Thanaleng, its Nong Khai or friendship border. If you say Thanaleng 99% won't know what that is. Went we say Nong Khai border crossing and talk about Laos visa, ofc we are talking about the Laos side.