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languageproficiency |
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| navigate by keyword : american app application assessment book cell cellphone class device digital display displayed duo duolingo education educational exam examination green internet iphone language languagelearning languageproficiency languages learn learning lingo logo media mobile online phone platform plus practice proficiency read screen site smart smartphone social speech technology web website well |
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| Duolingo app displayed on smart phone. Duolingo is an American language-learning website and mobile app, as well as a digital language-proficiency assessment exam. |
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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