# Brain

### [Dear Duolingo: Is it too late to become fluent?](https://blog.duolingo.com/critical-period-learning/)

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### [How to use context clues while traveling](https://blog.duolingo.com/context-clues-while-traveling/)

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### [Dear Duolingo: Could I invent an easier language?](https://blog.duolingo.com/language-irregularity-and-complexity/)

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### [Dear Duolingo: Why do some unrelated languages seem similar?](https://blog.duolingo.com/why-unrelated-languages-can-be-similar/)

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### [Can you learn two languages at the same time?](https://blog.duolingo.com/can-you-learn-two-languages-at-the-same-time/)

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### [Dear Duolingo: Why can learning feel overwhelming?](https://blog.duolingo.com/why-can-learning-feel-overwhelming/)

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### [Dear Duolingo Quiz: universal language, accents, speaking tips, and more!](https://blog.duolingo.com/dear-duolingo-quiz-universal-language-and-more/)

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### [“Can Duolingo make me fluent?” and other common questions from learners](https://blog.duolingo.com/can-duolingo-make-me-fluent/)

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### [Dear Duolingo: What does it take to stay fluent?](https://blog.duolingo.com/how-to-stay-fluent/)