There are four official languages in Singapore: English, Malay, Mandarin, and Tamil. This reflects the four major peoples who came to populate the city-state: Chinese, Malay, Indian, and colonial British. Every citizen of Singapore is issued a piece of government ID (the National Registration Identity Card) which has one of these races printed on it.
Does this discourage people from having mixed-race children?
Singapore twists the Asian brain. Just about every other Asian country is uni-cultural, at least according to the mainstream narrative. The Japanese people live in Japan and speak Japanese. The Vietnamese live in Vietnam and speak Vietanamese. The Thai people live in Thailand and speak Thai. Etc. This makes identity really easy — except if you live in Singapore, and there’s no Singaporean race, no Singaporean language, no ancient and venerable Singaporean hertitage. Blood and place and language and culture used to be inextricable, but we can no longer use any of these things to define one another. Fortunately, it says what you are right there on the card. I don’t think this is a particularly good idea.