An interesting plot point might be Smallville gets all excited for the exchange student from Japan. And when it turns out to be just plain Lois, an American who grew up in Japan largely on US military bases, people are disappointed.
You could even play on Clark's vaguely Japanese looks and have then go on a date to somewhere out of town, where people know there is an exchange student from Japan, and they all think it is Clark, and ask him if both his father and maternal-grandfather were in the US army.
