Duolingo, one of CNET's best language learning apps, is rolling out free advanced learning content that could make you ready to take on a new job or attend university in another language. The app is bringing advanced lessons to nine of its most popular languages, including English, Chinese and Spanish, on the free tier of the iOS and Android apps. That's right, these lessons are available at no additional cost.

"What we've built is an expert-designed curriculum that supports learners from their first word through advanced language content relevant to getting a job, attending university, or navigating life in a new country, and it's free," Bozena Pajak, Duolingo's head of learning science, said in a news release. 

These advanced lessons are meant to help learners communicate at an intermediate ability, attaining a Common European Framework of Reference for Languages level of B2. According to the CEFR, a person at this level is considered an independent user, which ranks just below a proficient user. At this level, the CEFR says a person can "understand the main ideas of complex text on both concrete and abstract topics, including technical discussions in his/her field of specialisation."

Your progress towards this level is measured in the Duolingo app by your Duolingo Score. This score reflects your proficiency in a language, and a score of 129 is the equivalent of the CEFR level B2. 

You can see your Duolingo Score in the top left corner of the app's home screen. You can then learn more about your score by tapping it in the top left corner and then tapping More About Score.

For more on Duolingo, check out our review, and read what to know about chess lessons on the app. You can also take a look at our roundup of the best language learning apps.

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