Misc: What nationality is the Formula One driver Mika Hakkinen?

Questions

What is the most widely spoken member of the Iranian branch of the Indo-Iranian languages, a subfamily of the Indo-European languages?

What is the most widely used seasoning?

What is the name for a sexual disorder in which a person obtains gratification by receiving physical pain or abuse?

What is the name for a woman who is superior of a convent in certain religious orders?

What is the name for music that is transmitted orally or aurally (taught through performance rather than with notation, and learned by hearing)?