Acknowledgements

Last updated: 2026-07-26.

Anyvoc builds on publicly licensed language data and open-source software. The notices below are provided to satisfy the attribution requirements of the original authors.

Word frequency tables

Source: Leipzig Corpora Collection, Leipzig University.

Goldhahn, D., Eckart, T., & Quasthoff, U. (2012). Building Large Monolingual Dictionaries at the Leipzig Corpora Collection: From 100 to 200 Languages. In Proceedings of the 8th International Conference on Language Resources and Evaluation (LREC 2012).

• License: Creative Commons Attribution 4.0 International (CC BY 4.0) — creativecommons.org/licenses/by/4.0/
• URL: wortschatz.uni-leipzig.de

Anyvoc ships per-language frequency tables derived from the corpora above.

Age-of-Acquisition norms (English)

Source: the age-of-acquisition ratings published as supplementary material to the study below.

Kuperman, V., Stadthagen-Gonzalez, H., & Brysbaert, M. (2012). Age-of-acquisition ratings for 30,000 English words. Behavior Research Methods, 44(4), 978–990.

Anyvoc ships an English word list derived from those ratings and uses it to estimate how early a word is typically learned. We are not aware of separate licence terms accompanying the published ratings; this use rests on attribution to the authors.

Open-source software

Anyvoc includes open-source software released under permissive licenses (in particular Apache 2.0, MIT, ISC and BSD). The following components are called out explicitly as required by their licenses or by trademark policy:

• Google ML Kit (Text Recognition) — Apache License 2.0. Copyright © Google LLC. developers.google.com/ml-kit
• Mozilla Readability — Apache License 2.0. Copyright © Mozilla Foundation and contributors. github.com/mozilla/readability
• SheetJS (xlsx) — Apache License 2.0. Copyright © 2013–present SheetJS. Used for spreadsheet import. sheetjs.com
• React Native and Expo (MIT). Copyright © Meta Platforms, Inc. and 650 Industries, Inc., respectively.

Beyond the components named above, Anyvoc bundles a number of further libraries under MIT, ISC and BSD licenses, whose terms require their copyright and permission notices to be reproduced. If you would like the complete list together with the full license texts, write to feedback@anyvoc.eu and we will send it to you.

Fonts

• Inter Tight (mobile app) and Inter (this website) — SIL Open Font License 1.1, full text at openfontlicense.org. Copyright © The Inter Project Authors (github.com/rsms/inter-tight, github.com/rsms/inter)
• Ionicons (MIT). Copyright © Ionic. ionic.io/ionicons

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• Apple®, App Store® and Sign in with Apple™ are trademarks of Apple Inc.
• Google Play™ and Google Sign-In™ are trademarks of Google LLC.
• Other names are, where applicable, trademarks of their respective owners.

Something to correct?

If an attribution is missing or wrong on this page, please let us know: feedback@anyvoc.eu.