@tuba..
eve got no accurate source for that... my answer was based on full use of common sense.
here it goes;
Pak occupies 6th position among the most populous countries in the globe.
after UK,AMERICA,CANADA,BRAZIL and INDIA Pakistan is next under the impression of ENGLISH LANGUAGE.

RUSSIA, CHINA, FRANCE , GERmany and tthe like various other countries are adhesive enough to the specifications of their own languages.

@Farrah...

Whatever i posted before was it not sufficient to answer your question ???