Official languages

[pnwmom]

http://en.wikipedia.org/wiki/Official_language

"Approximately half of the world's states have official languages. Some have only one official language, such as Albania, France, or Lithuania, despite the fact that in all these countries there are other indigenous languages spoken as well. Some have more than one official language, such as Afghanistan, Belarus, Belgium, Bolivia, Canada, Eritrea, Finland, India, Israel, Pakistan, Paraguay, South Africa, and Switzerland.

In some states, such as Italy, Palau, Philippines, Russia and Spain, there is an official language for the state, but minority languages are used in some important regions. Some states, such as Sweden, Tuvalu, the United Kingdom, and the United States have no official language, although in most such cases there is a single de facto main language, as well as a range of government regulations and practices on which languages are expected to be used in various circumstances."

For a list of official languages by country:

http://en.wikipedia.org/wiki/List_of_official_languages_by_state

(English is an official languages in 41 countries, by my count, and French in 31.)