> For context, Sriracha is a name of a district in Thailand. As it is classified as geographical name, it cannot be registered as a trademark on its own in both Thailand and USA

Weird. Literally hundreds of food items across the EU are trademarked by their origin. Brie de Meaux can only come from Meaux with cow milk from Meaux-inhabiting calls. Same goes for Coulommiers ( a type of cheese that has to come from the village of Coulommiers), Parmigianino Regiano, Gouda, Edam, Gruyère, Gorgonzola, etc. etc. etc.