Many people can speak english in japan. people speak australian in australia. people don't speak russian in france . people speak mexican in mexico. many people can speak france in canada. придумайте вопрос и ответ по возможен вопрос. don't they?

Why many people in Canada can speak on Franch?
 Because Franch it is the official language

Why many people in Japan can speak on English?
Because English is a very popular language in the world