<https://unravellingmag.com/articles/mutations-in-celtic-languages/#webpage>
<http://schema.org/description>
"If you’ve ever started learning a Celtic language, you may have come across a particularly interesting grammatical phenomenon in which the beginning of words can change or ‘mutate’ in certain contexts. For example, let’s take the Welsh word Cymru, which means ‘Wales’. Normally this word starts with a c, but if you have ever visited Wales, you most likely would have passed a sign with the words Croeso i Gymru, or ‘Welcome to Wales’, and you can truly say that you are now yng Nghymru, that is, ‘in Wales’."
<https://unravellingmag.com/articles/mutations-in-celtic-languages/>