Tarc looks like a game on the surface — XP, streaks, gems, a leaderboard — but every one of those mechanics exists to support one underlying system: a daily lesson loop paired with spaced-repetition review. Tarc now teaches 11 languages with that same system, plus a set of practice tools around it. Here's how the pieces fit together.
Tarc currently offers courses in Arabic, Russian, Latvian, English, Turkish, German, Spanish, French, Japanese, Chinese and Korean. All of them run in the same app with the same lesson engine, so once you know how one course works, you know how they all work — what changes between courses is the content: scripts, vocabulary and grammar. You can switch courses at any time from the Learn tab, and each course keeps its own progress. The app interface itself is available in English, Uzbek, Russian and Turkish.
Courses are organised by CEFR level, beginning with a Starter level for complete beginners (including the alphabet or writing system where the language has one) and continuing upward through A1, A2, B1 and B2 — and up to C1 and C2 for most languages. Not sure where you belong? You can pick your starting level or use the level check to find it. From A2 upwards you can also choose a profession track: the lessons stay the same for everyone, but the vocabulary shifts to your field (for example, IT vocabulary instead of everyday vocabulary).
Each time you open a course, Tarc serves a short lesson built from two ingredients: new material (the next unlearned word, letter, or grammar point in the course sequence) and review (material you've already met, due for another look). You never get a lesson that's 100% new — review is baked into the structure from day one, not bolted on as an afterthought.
Underneath the visible lesson content, a scheduling system tracks each vocabulary item and rule you've met and estimates when you're likely to start forgetting it. Items you've gotten right repeatedly get spaced further apart, while items you've missed come back sooner — the review queue for tomorrow's lesson is built from that estimate, not a fixed syllabus.
Outside the main lesson path, the Practice tab gives you tools to reinforce material on your own schedule:
Two more tools live elsewhere in the app: My Words lists every word you've studied, and Read your own text lets you paste any text in a supported language and see which words you already know. For languages with their own writing systems, such as Arabic, Japanese, Chinese and Korean, there is also handwriting practice.
XP is a running total of correctly completed lesson content — a rough proxy for how much you've actually practiced. Gems are earned alongside XP and are spent in the optional shop; neither one gates course content. A streak counts consecutive days with at least one completed lesson, and the daily goal ring on the Learn tab shows progress toward a small XP target for the day — small deliberately, so it can be cleared in a few minutes.
Daily quests give small, optional extra goals, and a daily login reward is waiting each day you open the app. Achievements record milestones along the way, and the Progress tab shows your stats (words learned, days completed) next to the global leaderboard. You choose whether your profile is public: switch it on to appear on the leaderboard and be discoverable, or keep it private.
You can personalise your profile with a photo and spend gems in the Shop on cosmetics, daily deals and limited-time seasonal events. Tarc is free to use and works in any modern browser; it can be installed to your home screen, and there is an Android app too. You can start as a guest, and signing in with Google or email saves your progress to the cloud so it follows you between devices.
See also the reference page: Learn Languages with Tarc.
Inside them — each daily lesson is built from a mix of new material and review items chosen by the spaced-repetition schedule, rather than review being a separate mode you have to remember to open.
No — they're progress indicators and shop currency respectively, not gates. Course progression depends on completing lessons, not accumulating a certain amount of XP or gems.
Your course progress and spaced-repetition schedule aren't reset — only the consecutive-day streak counter is affected. You can simply resume lessons the next day.
No — they're optional supplements. The core lesson path is what actually moves you through a course's levels.
Arabic, Russian, Latvian, English, Turkish, German, Spanish, French, Japanese, Chinese and Korean — all in the same app, with the same lesson system and a separate progress track for each course.
Tarc is free to use and you can start as a guest. Signing in with Google or email saves your progress to the cloud so it syncs across devices; the shop's cosmetics and boosts are optional.