Why do Hindi people have dots on their head?

It's not accurate to say that "Hindi people" have dots on their head. The practice of wearing a bindi, which is the dot you are referring to, is not exclusive to people who speak Hindi or are from a specific region.

Here's why:

* Bindi is a religious and cultural symbol: It is worn by women (and sometimes men) of many different religions and cultures in India and beyond. It's not specifically tied to the Hindi language or ethnicity.

* Different interpretations: The bindi can have different meanings depending on the religion or culture. Some see it as a third eye, symbolizing spiritual awareness, while others view it as a mark of married status or a symbol of beauty.

* Variations: Bindis come in various colors, sizes, and materials. The choice of a specific bindi can signify different aspects of the wearer's beliefs or preferences.

Therefore, it's incorrect to generalize about a whole group of people based on a cultural practice that has diverse meanings and is not exclusive to any single group.