In its very early days, Duolingo was built around teaching English speakers languages that were very similar to English–that is, languages that are written in Latin script and have similar written conventions and linguistic properties to English. As we expanded into the wide range of courses we support now ...
by Celena Chen on Mon 03 February 2020
by Joseph Rollinson and Xiangying Jiang on Fri 31 January 2020
We are always trying to make Duolingo a more effective learning tool. Our Learning Assessment team spends all their time understanding what our users are learning from Duolingo. In this post, we will share our approach to measuring learning in the app, as well as some of the challenges that we face and how we are overcoming them.
by Lavanya Aprameya on Fri 10 January 2020
“Test everything.” This is one of the key operating principles that we follow at Duolingo in order to continuously improve the learning experience for our users. It means we rely heavily on experiments and data to help us make informed decisions about any updates or new features we launch.
by Maggie Hewitt on Thu 19 December 2019
Over the course of the 2019 Democratic debates, we analyzed each candidate's language choices with a tool we developed called the CEFR Checker to measure the English proficiency level that they used. Read on to see how the candidates have measured up.
by Will Monroe on Mon 16 December 2019
Duolingo's fun, quirky sentences can usually be translated in many different ways. For example, the German sentence Hilfe, das Pferd frisst die heilige Kartoffel! ("Help, the horse is eating the holy potato!") currently has 72 accepted translations, with "eats" instead of "is eating", "this" and "that" instead of "the ...
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