Re: Victims of caste system in Punjab
Who said that it is not used for Sikhs? Punjab region which saw the settlement of so many foreigners was by 12th century designated as Mlechha desh. Even the staple food was given a low ranking and wheat which was mostly eaten in Punjab during that time was called “Food of the Mlechhas” 
. Usually, it took a couple of generations for settlers to lose their Mlechha statuses especially for the ruling families. Their children were given sanskritised names, they adopted local beliefs and slowly intermarried. But with the arrival of Islam, the invaders and those who came to rule did not adopt the local values and beliefs instead they tried to make local people adopt their beliefs. So the lines between Mlechhas and non mlechhas became more established,