What this app is built on
The open data and tools behind the German grammar, example sentences, and content in this app.
Tatoeba
Example sentences and their English/Turkish translations
Every one of the 2,255 German example sentences in this app comes from Tatoeba, released under the Creative Commons Attribution 2.0 France licence (CC BY 2.0 FR).
Wikidata Lexemes
Grammar data: gender, plurals, and verb conjugations
German grammar data comes from Wikidata Lexemes, released under CC0 (public domain).
CEFR-J Wordlist
Topic and level classification
Word-level ratings (A1-B2) are informed by the CEFR-J Wordlist (developed by Tono Laboratory, Tokyo University of Foreign Studies).
DEMorphy
German morphology validation
Used server-side to validate grammar forms. DEMorphy, MIT License, © 2018 Duygu Altinok.
Newsreader
Typeface for German headwords
The Newsreader typeface is licensed under the SIL Open Font License 1.1 and served locally by this app. productiontype/Newsreader