Last updated 2026-10-11
pyontan stands on other people's work. Each dataset below stays under its own licence.
pyontan uses the JMdict, KANJIDIC2 and KRADFILE dictionary files. These files are the property of the Electronic Dictionary Research and Development Group, and are used in conformance with the Group's licence (Creative Commons Attribution-ShareAlike 4.0). They are read through the jamdict library.
Pitch accent data comes from Kanjium (Creative Commons Attribution-ShareAlike 4.0), which is compiled from Wiktionary and other sources.
Example sentences and their translations come from Tatoeba and its contributors (Creative Commons Attribution 2.0 France), through the ready-made pairs at manythings.org/anki.
Recordings of single words come from the yomitan-ultimate-audio collection and server by friedrich-de (animecards.site): NHK, Shinmeikai, Daijisen, JapanesePod101, Forvo and more, with speakers named where the recording has one. Words with no recording are read by Amazon Polly with their pitch accent.
The recorded voices in Study's listening questions come from Mozilla Common Voice (Japanese), read by its volunteers and checked by other volunteers (CC0). The clips are trimmed and evened out in volume.
The N5 to N1 vocabulary lists are by Jonathan Waller (tanos.co.uk, Creative Commons Attribution), through open-anki-jlpt-decks by Jamie Sinclair (MIT). They are unofficial lists: the JLPT does not publish official ones.
Japanese text is split into words with SudachiPy and SudachiDict by Works Applications (Apache License 2.0).
Whole-page manga scanning uses the comic text and bubble detector by ogkalu (Apache License 2.0), used unchanged.
The Offline translation engine runs LFM2-350M-ENJP-MT by Liquid AI (LFM Open License v1.0), through the ONNX export by onnx-community. It is downloaded from Hugging Face when someone installs it, and used unchanged.
Live Audio finds where speech starts and stops with Silero VAD by the Silero Team (MIT), used unchanged.
Most icons are from Lucide (ISC licence). The Discord and Patreon logos are from Simple Icons (CC0) and belong to their owners.