According to Sean McGibney. (2023, July). What Percentage of the World’s Population is Bilingual?. newsdle. What Percentage of the World’s Population is Bilingual? We know that "43% of the world's population is bilingual”. With the huge number of people who know a second language, the connection between humans becomes straightforward. They can communicate with foreigners, exchange and learn knowledge from developed countries and have higher positions in the workplace. However, people who only know one language will meet significant struggles in work, the most basic example is not understanding the foreign materials. So if one person wants to study a new language, what is the best way to study? The most effective way to learn a new language is to experience and immerse yourself in it, talk with foreigners, watch films or read books, as long as excessive exposure to non-native language will make you feel familiar like native language.