The internet is full of language based preferred websites, why would a currency be any different?
Bitcoin is a protocol. It is an open -- it can be used by anyone from anywhere.
Do they use http:// in Brazil? Do they use SMTP in China? Or how about XMCP/Jabber in Tanzania?
Yes on all counts because those are all open protocols.
Now because of differing languages, governance, cultures, geography, and rates technological adoption there will be some areas in which Bitcoin gains traction and others in which it lags far behind.
But just like how there is now an intro site for those who read Swahili (the language local to many in Africa, including Kenya), Bitcoin's reach is expanding further every day.
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http://www.bitcoins.co.ke