Well first of all, “Indian” isn’t a language. There a many native languages in India that they don’t share with each other. They probably used English in order to reach most of the country. Also, they probably knew this would make big news internationally, and it would be more affective if everyone understood their signs without translation.
Response to A Muslim 4th-Grader’s Letter To Santa:
You can barely consider this a joke. It has not one ounce of humor, and even less intelligence, if that’s even possible.