If they come back from abroad. At first he might have changed? Culture, food and language because they still feel the same, but what if the back country of Thailand has some he will return to Thailand as a country that used to be.
If he returned from abroad. First, he might be some changes in culture, language, housing and food, because he used to do the same. But back in Thailand for a while, he will return to Thailand as it used to be.