We have a LOT of Indonesian places here....usually a combination of Chinese and Indonesian....not much Thai. But, when I first got here, it was required that I go to school for at least a year to learn Dutch, and at the end of that year, there was a test comprised of Speaking, Writing, Listening, Reading, and a traditions/norms test. You had to pass the language components with at least a level 2 (it goes up to 4, though the test only measures to 3.2 for some reason) and the traditions/norms test with an 80% or higher. If you pass everything, you are done, if not, you do another 6 months. Of course, these classes are with a bunch of other foreigners all from different places, so I made friends from a wide range of countries.
One friend is from Malaysia, one from Sri Lanka, 2 from Mexico, 1 from Iran, and 1 from either Indonesia or Thailand....I don't remember anymore and that friend and I have lost touch since I moved out of Arnhem.
Anyway, one of the things we do is get together and teach each other how to make traditional dishes from our countries. I'm pretty sure the last one I mentioned is Thai....she's a chef, and she taught us how to make Lumpias (spring rolls). They are SOOOO good and a huge hit at parties. She also taught us to make sweet chili sauce to dip them in, but you can buy that at the store, and I don't like sauces mostly, so I never bother to make it.