Licenses & sources

Where the content comes from: Wiktionary, a frequency word list, fonts and software libraries.

  • Wiktionary

    CC BY-SA

    Source for word meanings and example sentences.

    https://de.wiktionary.org
  • Frequency word list

    Public domain / open data

    Used to rank vocabulary by how common it is.

  • Google Fonts

    SIL Open Font License

    Typefaces used in the interface.

    https://fonts.google.com
  • UI components & libraries

    MIT

    Open-source software used to build the interface.

  • Speech synthesis

    Commercial API, per provider terms

    Used for read-aloud audio.

Own content

Lessons, exercises, stories and explanations are our own work unless noted otherwise.