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Cysill is a program for checking Welsh spelling and grammar (including mutations).

Cysgeir is a comprehensive and easy-to-search set of dictionaries.

Cysgliad runs on Windows 7, 8 and 10 Machines

There is currently no MacOS or Linux version of Cysgliad, but users can make use of the resources below Cysill Online, Bangor online Dictonary and National Terminology Portal.

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