Licences

This application incorporates lexical data and derived annotations from third-party resources. The original copyright holders retain their rights. The relevant sources and licences are listed below.

SUBTLEX-CY (Welsh Frequency Data)

Welsh frequency values in this database are derived from the SUBTLEX-CY corpus.

SUBTLEX-CY is licensed under the Creative Commons Attribution–NonCommercial–NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence.

This licence permits sharing with attribution for non-commercial purposes only. No derivatives of the original dataset may be distributed. Full licence text: https://creativecommons.org/licenses/by-nc-nd/4.0/

Attribution: SUBTLEX-CY Welsh frequency norms dataset.

Welsh–English Dictionary Data

Welsh–English translation pairs are derived from the bilingual dictionary distributed in the CardiffNLP repository:

https://github.com/cardiffnlp/en-cy-bilingual-embeddings

Licensed under the Apache License, Version 2.0.

You may obtain a copy of the Licence at: http://www.apache.org/licenses/LICENSE-2.0

Redistribution of this data complies with the terms of the Apache 2.0 Licence.

WordNet Semantic Themes

Semantic theme labels are derived from Princeton WordNet.

WordNet is provided under the Princeton WordNet License.

WordNet is available for research and commercial use subject to the terms of its licence, including preservation of copyright and disclaimer notices.

Full licence: https://wordnet.princeton.edu/license-and-commercial-use

English Word Frequency Data

English frequency values are derived from the Kaggle dataset:

“English Word Frequency” by R. Tatman https://www.kaggle.com/datasets/rtatman/english-word-frequency

Licensed under the MIT License.

The MIT License permits reuse and redistribution provided that the copyright notice and licence text are included.

Software Used in Construction

Parts of the lexicon were generated using spaCy, which is licensed under the MIT License.

https://github.com/explosion/spaCy

spaCy is used for part-of-speech tagging during lexicon construction.

Privacy

CymruCards is - and will remain - a free app. The aim is to support your learning experience while collecting the minimal amount of data needed to provide you with a user account, and to keep improving the app.

The app stores some basic learning activity so your progress can be saved and restored when you sign in. This includes things like which cards you have viewed, which ones you removed, your session totals, and your chosen settings.

If you send a translation report using the question-mark button, the report is emailed to the developer - Louis - so potential errors can be corrected. The message includes the Welsh word, the English translation shown, and related card metadata. If you are signed in, it may also include your account ID so the issue can be traced and resolved.

The app uses analytics to understand general usage patterns, such as which screens people visit and which features are used. This helps improve the app. The app itself does not collect raw IP addresses for individual users.

Your sign-in and data transfers use encrypted HTTPS connections and established cloud services (including Supabase and Google Analytics), which are widely used to securely operate modern web applications. As with any internet service, no system can guarantee absolute security, but the app is designed to use standard safeguards and to minimise the amount of personal information collected.

About

This app was developed by Louis Dennington, a clinical psychologist with an interest in the Welsh language: https://www.louisdennington.co.uk

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