Language Dex lets language learners create custom dictionaries with definitions, examples, pronunciation, and confidence levels. It includes a reader for adding words from excerpts, practice puzzles for recall and spelling, language statistics, and sharing features.
In the Language learning space, Language Dex takes a focused approach. It focuses on retaining and practicing personally defined vocabulary in a structured way. It is built as an open-source project for language learners. The project is open source (GPL-3.0). Language Dex is available on the web and Android.
Arthur Cosentino builds and maintains Language Dex, and it first shipped in 2025. The project is developed in the open on GitHub with 32 stars and 13 commits in the last 90 days. Key capabilities include custom dictionaries, word definitions, and example sentences. The interface is available in 26 languages, including Arabic, Tibetan, and Catalan.
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