Yes only moneys in Thailand. As I just said but I will repeat it, it goes to the local family court for probate and with the letter from the court, take that to the bank and you can withdraw the money, ( this was told to me by the Krungsri bank in an email reply from them, when I asked if I could nominate my wife as beneficiary) .. along with his/her passport, and bank book, will or no will.
Also I don't think the family court charges are much, if any, even Thais have to do this TTBOMK.