The 2021 Duolingo Language Report presents the latest language trends and learner behaviors based on data from over 500 million Duolingo learners around the globe. Duolingo is the world's most downloaded education app, and we offer over 100 courses teaching 40 languages—all for free. As a result, our data offers unique insights into what languages learners worldwide want to study and how their interests change over time and geography.

The results of the 2021 Duolingo Language Report clearly show that learners continue to turn to languages to build bridges with cultures and people, across distances we can't quite traverse in person—yet.

For learners around the world, 2021 wasn't the return-to-normal we had been envisioning since the start of the COVID-19 pandemic. It's no surprise that Duolingo's Most 2021 Phrase was "I am mentally exhausted." Much of the globe continued to cycle through stay-at-home orders, delayed return-to-office plans, and ever-changing health policies—but the year was not without bright spots, including vaccines, the Olympics and UEFA Euro tournament, and plenty of captivating TV.

And for millions of people, language learning was another bright spot. In 2020, the Duolingo Language Report noted record growth of new learners who started studying a language during the pandemic, whether to keep up with schoolwork or connect with people around the world. This year's report investigates how those patterns have evolved in 2021.

Illustration of Duolingo characters Junior, Oscar, Zari, and Lucy enjoying Japanese and Korean books, music, and media.

Love for Asian languages continues to grow around the globe

In 2021, Asian languages—especially Japanese and Korean—attracted learners worldwide, building on the impressive growth observed in 2020.

  • Japanese surpassed Italian globally to become the 5th most popular language to study, and it's the fastest-growing language in the U.S. and U.K.
  • Korean—holding strong at the 7th most popular language to study around the world—is the fastest-growing language in Brazil, France, Germany, India, and Mexico, and it ranks as the second-fastest growing language in Japan!
  • Chinese, which was the 10th most popular language to study in 2020, has overtaken Russian and Portuguese for the 8th spot worldwide. It is also one of the top 5 fastest-growing languages in Mexico and Brazil.

The growth of interest in studying Asian languages shows no signs of slowing. The world is tuning in to more Korean and Japanese entertainment, listening to more K-pop, and reframing language study as something you do to complement and support your interests and other activities—not just something required of you in a classroom.

World interest in under-studied languages increases—again!

Learners around the world want to study a wider variety of languages than have traditionally been available to them. School districts and universities may be slashing language courses and funding, but our data shows that learners are more interested in studying languages for personal, cultural, and entertainment reasons—which has led them to study more diverse languages.

English, Spanish, and French remain the most popular languages to study globally, but when we look at the languages studied in individual countries, we see that more languages than ever before have reached the #1 spot: in 2021, 10 languages made the list of most popular to study by country, up from 8 languages in 2020 and 7 in 2016.

Color-coded map of most popular language studied on Duolingo in each country in 2021. The top languages are English, Spanish, French, German, Japanese, Italian, Korean, Irish, Swahili, and Swedish. Most of the countries are green, representing English, with large areas yellow for Spanish and blue for French. The other colors and languages are smaller and are scattered around the world.

Table of number of countries studying most popular languages in 2021. For English, 120 countries. For Spanish, 31. For French, 24. For German, 7. For Japanese, 5. For Italian and Korean, 2 each. For Irish, Swahili, and Swedish, 1 each.

The languages occupying the #2 spot in each country are also becoming increasingly diverse: this year, old favorites like French, Spanish, and German are joined by two new additions to this list: Finnish and Guaraní. Finnish has become the second most popular language to study in Finland, and similarly Guaraní, an indigenous language from South America, is now the #2 language studied in Paraguay, where it is an official language. While school, family, and friends are top reasons for these Finnish and Guaraní learners, the second most common reason for learning the language indicates some differences in these groups. Finnish learners in Finland study more for work, which could mean they are likely non-Finns working in Finland. Guaraní learners in Paraguay are more motivated by culture (they are probably the ~20% of Paraguayans who don't already speak Guaraní or may be non-Paraguayans now living in Paraguay.)

Color-coded map of second most popular language studied on Duolingo in each country in 2021. The second most popular languages include French, Spanish, German, English, Japanese, Korean, Russian, Turkish, Chinese, Portuguese, Italian, Danish, Finnish, Guarani, Hindi, and Norwegian. There are large blues areas, for French, and yellow for Spanish and orange for German are also prominent. The other colors and languages are really scattered around the world.

Table of number of countries studying second most popular languages in 2021. For French, 66 countries. For Spanish, 59. For German, 14. For English and Japanese, 10 each. For Korean, 8. For Russian and Turkish, 5 each. For Chinese and Portuguese, 4 each. For Italian, 3. For Danish, 2. For Finnish, Guarani, Hindi, and Norwegian, 1 each.

Family and culture drive learners to study new languages

COVID-19 continues to stifle travel plans in most parts of the world, so learners are thinking less about languages to use on the road and instead are studying for reasons closer to home: to connect with the family, friends, and cultures that have kept them going through nearly two years of pandemic precautions.

U.S. and French learners are examples of this global trend. In just one year, family has overtaken school and brain training to become the top motivator for new U.S. learners. For French learners, culture and family have both grown as reasons to study, while travel continues to be grounded. On the other hand, Mexico and Brazil stand out as places where interest in languages for travel has seen a slight increase, suggesting that learners in these countries are ready to start thinking about traveling abroad.

Illustration of Duolingo character Lin with her grandmother Lucy. They are looking at each other affectionately.

Family and culture have become important motivators for language study, and this is especially true for learners studying Asian languages. For example, over 18% of new learners studying Japanese are motivated by culture; in contrast, only 8% of English learners, 9% of Spanish learners, and 10% of French learners in 2021 chose culture as their primary reason for language learning.

The importance of family and culture for U.S. language learners was echoed in a recent national consumer survey Duolingo conducted in collaboration with DKC Analytics. Across all respondents, including those not currently learning a language, 65% said learning about a new culture would be their top reason for studying a new language—and culture ranked ahead of all other potential motivators.

Of those respondents who had started learning a language during the pandemic, 70% say their learning is related to family heritage, ancestry, or culture. In fact, 94% of learners whose family language is endangered, indigenous, or otherwise under-studied said they would be interested (or very interested!) in learning that language. Data from learners on Duolingo supports this finding: when learners have access to more diverse course offerings, including less-commonly studied languages that better represent their interests, families, and communities, people are excited to start studying a language.

Language learning highlights from around the world

There's even more to uncover in our data about how interests in languages grow and change over time. Below are some other notable findings from around the world.

  • Top 10 languages studied around the world (in order): English, Spanish, French, German, Japanese, Italian, Korean, Chinese, Russian, Portuguese.
  • In 2021, the hardest-working countries were (in order): Czechia, Japan, Belarus, Germany, and Hungary. These are the countries that complete the most lessons per learner. This year's ranking marks gains for Czechia and Belarus, and slight drops for Germany (the former #1) and Hungary (formerly #3).
  • Like the rest of the world, Brazil is excited to study Japanese and Korean: Japanese is the fastest-growing language in Brazil, and Korean is 4th—reversing the 2020 order, which had Korean ahead of Japanese. But the fastest-growing language in the country is Turkish, likely due to Brazilians' interest in Turkish soap operas!
  • The fight for Australia continues: French was the most popular language to study there in 2016, ahead of #2 Spanish, but Spanish pulled ahead to #1 in 2020. This year, French is back on top.
  • South Africa, on the other hand, has seen its Spanish-learning population just overtake the number of French learners: while French was #1 in 2016 and 2020, Spanish is now the most popular language to learn. South African learners will be an especially interesting group to watch in the coming years, as Duolingo is launching new courses in 2022 to teach Zulu and Xhosa, two languages from South Africa. Will interest in Spanish and French decline when learners are able to study the languages of their country?
  • Welsh continues to be one of the fastest-growing languages in the U.K., even six years after the course was introduced. In 2020, Welsh ranked #1 among fastest-growing languages, and it made a strong showing at #2 in 2021. This year, Welsh was beat out by Japanese for the top spot, and British learners' growing interest in these languages demonstrates what we see around the world: people are studying more Asian languages and more languages with personal significance.
  • In Japan, Korean has skyrocketed to become the second most popular language to study—and it wasn't even in Japan's top 5 last year!
  • Learners throughout Africa are also studying a wider variety of languages. In 2020, English and French were the #1 languages to learn in Africa, but this year five languages reached #1 across the continent: English, French, Spanish, German, and Swahili!
  • Irish has retained its popularity in Ireland as the #1 language to study, and it has beat out Spanish for the second year in a row.
  • In 2020, Japanese and Korean were on the map as the most popular languages to study in some of Southeast Asia and the Pacific, and their popularity has grown: there are now more Korean learners than English learners in Mongolia, and these languages occupy both of the top spots in Bhutan, Brunei, Malaysia, Myanmar, and the Philippines.

About the data
The 2021 Duolingo Language Report includes information about learners who studied languages on Duolingo between October 1, 2020 and September 30, 2021. The data was aggregated by country or by language to ensure learner privacy. Country aggregations are based on internationally-recognized, independent, self-governing entities as outlined here. Also to the end of protecting learner privacy, rankings exclude countries where there are fewer than 5,000 Duolingo learners.