How did so many languages end up with such similar alphabets?
Most European languages seems to share a very large amount of their respective alphabets. The pronunciation may be different but the symbol is the same.
Why?
Because most of them are based on very few languages, e.g. Latin.
But the Latin alphabet looks very different from the alphabet you see in most of these countries I'm referring to
Dark green is Latin based. It's like almost all of Europe. What countries do you speak of then?