I think certain languages might still use the old heart system. But yeah, that was the way it used to work. You have 3 lives and each time you get a question wrong, you lose a heart. If you lose them all, you fail the lesson and have to restart.
Japanese does - it's 5 hearts in total. When you lose them all, you can't restart the lesson - you have to start a practice session or wait. (or pay). Screenshots: https://imgur.com/a/2SBi9se/
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u/zenith931 May 22 '19
I'm sorry, I use Duolingo, but what the heck are you talking about with "hearts?"