I've always understood it that English was difficult because it's such a horribly inconsistent language, and somewhat of a mongrel too.
It's not a language isolate, in fact it shares the same root as German, Frisian, Iclandic, Norwegian, Swedish, Danish and Dutch.
The problem with English is the huge influence of the Celtic languages, and the post-germanic influence of the scandinavian languages, french and latin after all our invasions/settlements.
I think the main reason the English are so low on the table of polylinguism (a real word? i like it anyway) is the fact we start learning a second language so late.
Add to that the languages are almost always learned academically (as in, GCSE, A-Level, Degree) without any real-world use and you see why we're so uselsess.
I've been in France with someone who had a degree in French and they couldn't understand a thing - the difference? I hadn't studied the language since I dropped it for GCSE (clash with another subject) at 14 and I was then 20 - but lived and worked in France for about 7 months.
I learned all the French I now have by living in France.
The big difference is when you learn a language academically you don't really learn to
hear it properly. Enough to pass exams, yes, but you're not tuned into it the way someone who learns it by immersion would be, or the way a non-native speaker learns English through exposure or immersion.
Most foreign students of English actually have some interaction with the language be it through pop culture (music, movies), tourism or immigrants (in either direction).
As for the Irish learning Gaelic first...
...unless they go to a gaelscoil, live in a gaeltacht or some from a home where gaelic is the first language - most learn English first and learn Gaelic as a second (and academic) language.
Thankfully Gaelic is becoming more "cool" at the moment so it's becoming far more widely spoken.
I've got a lot of family in Ireland, and a few of them are native speakers - they use Gaelic over English whenever they are with their friends and use both at home.
I love languages - which reminds me - I must crack on with the Irish course I'm doing at the moment!
