Wiktionary:Frequency lists/Welsh
- Word frequency lists for English and other languages from 10K up to 1M, available for download as part of the Leipzig Corpora Collection (CC BY-4.0)
- Corpws Cenedlaethol Cymraeg Cyfoes (CorCenCC) – National Corpus of Contemporary Welsh (CC BY-SA-4.0)
- Geiriau ysgrifenedig mwyaf aml y Gymraeg a Saesneg — Wordlists of the most common wordforms in Welsh, and the most common English words used in Welsh (Apache License 2.0)
- Cronfa Electroneg o Gymraeg (CEG) A 1 million word lexical database and frequency count for Welsh - © Ellis, N. C., O'Dochartaigh, C., Hicks, W., Morgan, M., & Laporte, N. (2001)
- The Welsh Vocabulary Builder based on the CEG © Antone Minard, 2013