The "language" is welsh, except it isn't a proper language, it is full of english words, "of course", "internal combustion engine", "diesel" etc etc, oh, and swear words too.
50 years ago it was a dead language, and that is where it should have stayed, with a few inbreds up in the hills, but someone figured out that after we joined the EU (European Union) it would be a cool card to play to get special treatment, so a campaign was started, and lo and behold wales got awarded special status and started accruing all sorts of money, grants, and financial waivers.
Now being cornish ancestry myself I can dig having an ancient celtic language around and keeping it alive, but there is a big difference between that and what the welsh do, which is why generally speaking the welsh aren't liked.
The instant you drive into wales over the severn bridge the road signs change, you are still in the United Kingdom, but every road sign is in welsh first, with english below it. Walk into a pub and nobody can speak english, until you call them welsh assholes at which point they can all suddenly speak english because they can't curse you back in welsh.
Most annoying is if you go to the Uk Passport office or DVLA office (Driver and Vehicle Licencing Agency) both of which are in wales, which is part of the UNITED KINGDOM, and yet every sign is in welsh first, then english.
If you go to areas of London such as Hounslow all the shop signs are written in arabic script, all the shops and banks are "foreign" and everyone speaks arabic or pakistani or hindustani or arabic or whatever and everyone wears non english dress, which is EXACTLY what happens in wales, but because they are wogs and not sheep shaggers all of a sudden it is not a good thing, but a bad thing, and everyone starts whining about why can't the bastards speak english, even though they, unlike the welsh, do not get special grants and tax breaks that effectively mean the rest of us are subsidising us.
Being celtic myself I can tell you that genetically we are the definitive mongrels, so there is no celtic race or welsh race, being "welsh" means living there and speaking the language, yes there are welsh names and welsh "faces" but they aren't a race of peoples as such, and their cultural identity is a lot less valid and coherent than say islam.
Internal fire and museum mines aren't welsh ideas, they have been done everywhere, but everywhere else doesn't have the vast tax breaks and subsidies and special status that you get when you are in wales, so they go bust.
Historically the various english tribes and the welsh have been at war since the year dot, most of this pre-dates everything except native american history, but nevertheless it is real and part of the cultural collective, down here where we have our own rich celtic heritage, which is well tied in with the breton in france and the basque in spain, welsh get short shrift, and welshmen are about as common as other ethnicities such as black, eg not common at all, I can go into town and spend a few hours and come back and not see one of either example.
When I lived and worked in spain I didn't just have the paperwork (this was before they joined the EU) but I spoke the language, and that meant engineering spanish too, I knew what a camshaft was, I could speak to a turner in spanish about his job (I remember one incident in which a young spanish turner after telling me what he did and I asked "wood or metal" went and turned to his mate and said "this is the first foreigner I have ever met who knew what my job was"
The english who limited themselves to por favor and gracias and congregated in english communities reading english papers and consuming english goods were treated and thought of pretty much like I think of the welsh, you are CHOOSING to make yourself different and not integrate, fair enough, you can be a bunch of sheep shagging inbreds and you can join the queues for party invites, jobs, and neighbourlyness at the back of the queue along with everyone else who wants all the benefits, but still wants special status too when it suits them.
The usa equivalent would be some cajun engine museum in new orleans producing a promotional video in cajun, despite the fact that there are more people in the states who speak polish or russian, and then getting bitchy when people ask why they didn't just film it in english.
