Language-learning app Duolingo makes around $500 million annually, despite offering all of its lessons for free. WSJ explores how the company is using AI and A/B testing to keep users hooked.

Duolingo is a free language-learning app which allows users to use ... Duolingo currently offers 42 different languages - 40 of which are for English speakers but what are the 10 most popular ...

We've tested a lot of different language learning apps, from Duolingo to Rosetta Stone. These are our top picks. Shelby Brown (she/her/hers) is an editor for CNET's services team. She covers tips ...

Users of the mobile language learning app Duolingo were startled in recent ... about 13% of hours viewed on Netflix in the US were non-English titles – with Korean, Spanish, and Japanese stories ...

With these language appsyou can confidently speak the language without embarrassing yourself every time you try to order a coffee ...

I mean, you literally make twice as much money if you know English. So that's kind of where the idea came from to have a free way to learn languages, and that was Duolingo." Luis and co-founder ...

The campaign, "Learn Korean or Else," includes a new voice-activated TikTok filter, inspired by the Red Light, Green Light game in "Squid Game." ...