Masha - dyslexia and stats are far more complex then you make out.
For example. It's very easy to get a dx of dyslexia in the UK - all you have to do is pay an EP £400. It is also very valuable to get a dx of dyslexia, it generally leads to exam concessions, like extra time, or a scribe, or a computer.
Are those two things true in Germany and Finland?
There isn't one definition of dyslexia, nor one diagnostic criteria. Each EP seems to make up there own. So are the UK EPs using the same diagnostic criteria as German and Finnish?
Also, I don't know the stats, but many people with a dx of dyslexia can read perfectly well, they are diagnosed on spelling problems. But they would also have memory and sequencing and other problems which aren't diagnosed as a separate disorder. In Germany and Finland those people might not get a dx of dsylexia, but still have all the problems.
Like my previous post said, it is possible that kids in Germany and Finland get far better treatment for the underlying problems which are causing their dyslexia than UK kids. Very possible (give that UK kids get no treatment at all.)
4% of the populations is still a huge amount. Far more than the amount of people with very low IQ, or who are non-verbal. If you are one of those 4% it matters not one bit that Finnish is easy to learn.
All I can say for 100% is my DD has now finally made it to the CVC stage, and so might be able to read Finnish if she'd had the same huge number of hours of tuition - but all her other problems would still exist making her still hugely disabled. Even if she could read and write she would still not be able to cope with school.
For example at the moment we're working on 'sh' - she can never remember whether to write 'sh' or 'hs' and just randomly guesses every time. Sometimes she get's 'sh' right first time when reading, sometimes she 'self-correct's and gets it right second time, and sometimes she panics, get's upset, and can't remember how to pronounce 'sh' at all. With a memory that bad, life is incredibly difficult - even if you can read.
Blaming the English language is very superficial, and shows no understanding of the problems caused by the label 'dyslexia'.