Interesting passage from the bible. Heard about it during the talk by Eduardo Galeano. It's an explanation for why there are multiple languages.

Quoted: Not long after The Flood (see also Sons Of Noah), about three centuries before the call of Abraham, humans were united in language (see Speaking In Tongues). But what did they do with their ability to work together? They set out to challenge God by presumptuously attempting to build a tower to heaven. And, as God Himself stated, that would have been just the beginning to "their" (see Blame It On Adam and Eve) rebellion.

The "Common difficulties faced in learning Hindi" section is helpful. I've mastered most..still need help on some.

Quoted: From Wikibooks, the open-content textbooks collection.