English is the most used language on Twitter. However, this is lower than the popularity of English on other platforms: e.g. more than 50% of websites all around the world are in English.
Japanese is the 2nd most popular language on Twitter despite the fact that it is the 9th most spoken in the world.
UPDATE: A more recent poll according to “Statista”, in 2018, the United States has the highest online population using Twitter followed by Japan, The United Kingdom and in forth place, Saudi Arabia.
