Attribution

Effective date: 2026-03-09

ExamRift uses the following open-source and openly licensed data sources to power its dictionary, vocabulary, and language-level features. We are grateful to the creators and maintainers of these projects.

WordNet 3.1

• Provider: Princeton University
• License: Princeton WordNet License (BSD-style)
• Website: https://wordnet.princeton.edu/
• Usage: English word definitions, synonyms, antonyms, and semantic relationships.

Wiktionary

• Provider: Wikimedia Foundation
• License: Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0)
• Website: https://en.wiktionary.org/
• Usage: Multilingual word definitions, phonetic transcriptions (IPA), and etymology.
• Note: Data accessed via kaikki.org dictionary exports.

JMdict

• Provider: Electronic Dictionary Research and Development Group (EDRDG)
• License: Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0)
• Website: https://www.edrdg.org/wiki/index.php/JMdict-EDICT_Dictionary_Project
• Usage: Japanese word definitions, readings, and grammatical information.

CC-CEDICT

• Provider: MDBG, original CEDICT by Paul Andrew Denisowski
• License: Creative Commons Attribution-ShareAlike 3.0 (CC BY-SA 3.0)
• Website: https://cc-cedict.org/wiki/
• Usage: Chinese word definitions, pinyin, and traditional/simplified character mappings.

Open American National Corpus (OANC)

• Provider: American National Corpus Project
• License: Unrestricted (open data, no restrictions on use)
• Website: https://anc.org/
• Usage: English collocation frequency data, example sentences in context, and genre-balanced language patterns.
• Note: Includes 15 million words of contemporary American English across spoken and written genres.

Google Books Ngram Corpus

• Provider: Google (via hackerb9/gwordlist)
• License: Creative Commons Attribution 3.0 (CC BY 3.0)
• Website: https://github.com/hackerb9/gwordlist
• Usage: English word frequency data used for CEFR level estimation (A1-C2).

Open-Source Commitment

All dictionary and language data used by ExamRift comes from openly licensed sources. We do not use any proprietary word lists, copyrighted vocabulary profiles, or commercially restricted datasets. Our CEFR level estimations are derived entirely from public-domain word frequency data.

Contact

If you believe any content on ExamRift has been used in error or requires additional attribution, please contact us at [email protected].