Below are some links I hope you will find useful if completing research on the Cornish Language.
Many other sources are available and can be found by completing an internet search via your search engine, and those listed are merely meant as examples of some of those;
(Any questions or comments in respect of the information contained in these links should be referred to the publisher of that information)
Kevren Campoll / Reference links
Skeul an Tavas - Acedemic
https://www.skeulantavas.com/academic
Conversational Phrases - Skeul an Tavas
https://www.skeulantavas.com/vocabulary/conversational-phrases
500 Most Useful Words -Skeul an Tavas
https://www.skeulantavas.com/vocabulary/five-hundred-most-useful-words
Cornish Today - Nicholas Williams
https://www.skeulantavas.com/miscellany/cornish-today
History of Kernowek Standard
Celtic Life International - History of The Cornish Language
https://celticlifeintl.com/history-of-the-cornish-language/
Papers on Cornwall - Ken MacKinnon
https://merryndd.github.io/f/mac-o.pdf
History of the Cornish Language –
https://www.historic-uk.com/CultureUK/The-Cornish-Language/
https://www.cornwall-calling.co.uk/cornish-language/language.htm
Cornish Language Fellowship –
http://www.cornish-language.org/index.html
http://www.cornish-language.org/history-of-the-Cornish-language.html
History of Cornwall -
https://www.cornwall.gov.uk/environment-and-planning/strategic-historic-environment-service/guidance/appraisals-and-surveys/cornwall-industrial-settlements-initiative/the-settlements/
Yn Mor