WWhile any language will be useful for some jobs or for some regions, French is the only foreign language other than English that can be useful throughout the world.
French is estimated as having 110 million native speakers and 190 million more second language speakers. According to a demographic projection, French speakers will number approximately 500 million people in 2025 and 650 million people, or approximately 7% of the world's population by 2050. Estimates in 2013 suggest that French speakers will reach 1 billion by 2060.