Open Source Licenses

Ocardric uses the following open-source resources to provide vocabulary learning content.

English Word Lists

1. CEFR-J Wordlist (Version 1.5)

• Source: Tokyo University of Foreign Studies, Tono Laboratory
• Citation: CEFR-J Wordlist Version 1.5, Compiled by Yukio Tono
• URL: https://github.com/openlanguageprofiles/olp-en-cefrj
• License: Free for use with appropriate attribution

2. New General Service List (NGSL) and related lists

• Authors: Dr. Charles Browne, Dr. Brent Culligan, Joseph Phillips
• URL: https://www.newgeneralservicelist.com
• License: Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
• License text: https://creativecommons.org/licenses/by-sa/4.0/

3. Frequency-based word lists

• Source: Various open-source frequency lists
• License: MIT / CC BY-SA 4.0

German Word Lists

1. Leipzig Corpora Collection

• Source: Universität Leipzig, Wortschatz Leipzig
• Citation: D. Goldhahn, T. Eckart & U. Quasthoff: Building Large Monolingual Dictionaries at the Leipzig Corpora Collection: From 100 to 200 Languages. In: Proceedings of the 8th International Language Resources and Evaluation (LREC 2012), 2012.
• URL: https://wortschatz.uni-leipzig.de/en/download/deu
• License: Creative Commons Attribution 4.0 (CC BY)
• License text: https://creativecommons.org/licenses/by/4.0/

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