Pronunciation of "Paraguay"

It's to do with American English spelling and pronunciation conventions getting mixed up with foreign words and their different conventions. The standard spelling and pronunciation of vowels in American English conflicts with Spanish spelling and pronunciation. The a's in "paragraph" look like the ones in Paraguay, similar spelling means similar pronunciation, unless you have taken Spanish or are exposed to it.

I don't know if it answers your question, but there is a good page where people upload the pronunciation of words in their respective languages. You can try it. Maybe you'll find something useful.