Credits & Licenses
VietLang is built on the work of open communities and open-source projects. Here's what we use and how it's licensed.
Dictionary data
VietLang's Vietnamese–English dictionary is adapted from Wiktionary, the free collaborative dictionary, via the kaikki.org machine-readable extract. This material is used under the Creative Commons Attribution-ShareAlike 3.0 license (CC BY-SA 3.0). We have modified it — reformatting, selecting, and organizing entries for learners. Adaptations of this dictionary content remain available under the same CC BY-SA 3.0 license.
Wiktionary — en.wiktionary.org
kaikki.org (Wiktionary extract)
Example sentences
Real-usage example sentences come from the Tatoeba Project and are used under the Creative Commons Attribution 2.0 France license (CC BY 2.0 FR). Each sentence in the app links back to its original entry on Tatoeba.
Tatoeba Project — tatoeba.org
Fonts
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Be Vietnam Pro — © Bien Tran, licensed under the SIL Open Font License 1.1.
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Lora — © Cyreal, licensed under the SIL Open Font License 1.1.
License: SIL Open Font License 1.1
Audio
Pronunciation audio is generated with ElevenLabs text-to-speech and normalized for consistent playback. Songs in the Community section are embedded from their official YouTube uploads — the rights holders retain all rights to that music, and we link out rather than host it. In-app folk-song lyrics are traditional Vietnamese songs in the public domain; the English translations are our own.
Open-source software
VietLang is built with Expo, React Native, React, and Supabase, along with many other open-source libraries, used under their respective MIT and BSD-style licenses. Icons are from Ionicons (MIT). Our gratitude to every maintainer.
Corrections
If you believe something here is attributed incorrectly or a source is missing, please tell us on the Contact page and we'll fix it promptly.