This is absolutely in no way whatsoever an attack on the Welsh language, nor is it an attack on its speakers or those who believe in these myths. I just want to get this off my chest more than anything. People need to stop saying this stuff because it's ridiculous and starting to really, really annoy me.
1. Welsh is not one of the oldest languages in Europe, nor is it any older than English
True, Welsh (and Cornish and Breton) come from the Brythonic language, which existed in Britain before Anglo-Saxon arrived, but that doesn't make Welsh older than English. No, English didn't 'come from German'. No, English didn't 'come from Latin'. And, goddamnit, no, English isn't a younger language than Welsh.
English as we know it today has changed a lot from Old English, which was a super cool language with lots of extra letters and is completely unrecognisable as the ancestor of today's language. It can be argued that Welsh hasn't changed quite as drastically as English over the centuries, but that doesn't make it any older either.
Maybe people think that Welsh is older because it existed in Britain before English did, maybe they think it's older because minority languages are generally linked with tradition, maybe it's the aftermath of decades of being told that English is the language of modernity and Welsh is the language of the olden days, but none of these things matter because, and this is the last time I will be saying this, so read it slowly and carefully now, please: the Welsh language is not older than the English language.
2. Welsh is not a dead language
Let's put it this way: I don't personally know anybody with an iPad, I've never used an iPad despite all the adverts I ever saw and I never will buy such a thing. But I don't claim that it doesn't exist just because I haven't personally encountered one or found use for one.
Me claiming that iPads don't exist is exactly how daft you sound when you say Welsh is a dead language, especially since it has 562,000 speakers in Wales alone.
3. Welsh is not a dying language
If you look at Fishman's Graded Inter-generational Disruption Scale, Welsh is most definitely at stage 1 or 2. That means, for a minority language, we're doing pretty damn well. I think more of us need to be grateful for that. Go and read about languages with less than 5 speakers and then see if you still want to complain about how we have English adverts on S4C.
4. Welsh spelling is not stupid
I can understand why words like anghydweddogrwydd might look like a mess to non-Welsh speakers, but while our spelling system may seem strange to outsiders, it is at least more or less, what we call, transparent. What this means is that a letter of the alphabet represents a particular sound and will represent that sound in all contexts. This seems basic enough, but there are plenty of languages that aren't transparent; English being one of them. Orthographical transparency is almost entirely true for Welsh however, with only a few exceptions that have simple rules that can be learned.
Most people can't get their head around the fact that <dd> is used in Welsh to represent [ð] (i.e. the 'th' sound at the beginning of the words 'the' and 'this'). It might seem weird to have <dd> for this sound but whether it is at the beginning, middle or end of a word, it will always be pronounced the same way.
What about English? Well, just then I had to clarify the fact that <dd> in Welsh is the 'th' sound of 'the' and 'this' rather than 'thin' and 'through'. In English, <th> represents both sounds [ð] and [θ] and it isn't immediately obvious which is used in what context. Essentially, with English you generally have to learn how to pronounce a lot of words individually, whereas a Welsh speaker will be able to pronounce almost any new or unfamiliar Welsh word when it is presented to them. If you need more proof, you need only try to list as many words as you can that end in -ough and hopefully you will never need to think that Welsh spelling is stupid ever again.
In fact, I'm not quite done just yet, because this is the one myth that bothers me above all others. I am going to give one final example before I leave you all alone. So let's look at a nice made up word:
The point is that Welsh spelling is far more regular than English so please stop complaining about it, thank you.
5. Welsh has no vowels
As far as phonemes go, standard RP English and Welsh have pretty much the same amount of vowels, with Welsh winning by one extra. When it comes to the alphabet, English vowels are taught as a e i o u (y), Welsh vowels are taught as a e i o u w y. So as far as the alphabet goes, Welsh has more.
So the reason why people think that Welsh has no vowels is because <y> is used to represent a vowel sound in Welsh, and <w> is used as both a vowel and a consonant (just like how <y> is used in English, e.g. yes vs happy). In fact, <w> is used to represent vowels in English, too (crowd, crown, news), so it's not that weird that we use it as a vowel (words like cwrw are a lot of fun for non-Welsh speakers). In fact, ever stop to think that the English name for <w> is called DOUBLE-U and the Welsh use it as a long [u:] sound? Logic'd.
6. Welsh is not just "a cheap copy of English"
Taxi comes from French (from German, from Latin)
Cube comes from French (from Latin, from Greek)
Pyramid comes from French (from Latin, from Greek)
Ambulance comes from French (from Latin)
Coffee comes from Italian (from Turkish, from Arabic).