Hello,
I have worked with a lot of open source that have multi-lingual features.
I can replicated same for Yoruba, Igbo,Hausa, etc. in your application
It is about defining the meaning of each languages and pluging it to the application that you want.
Get in touch with so that I can understand the type of website application that you want.
Check out my portfolio/recent works:
http://www.netxpertsolutions.com/portfolioMy Phone: 08037184179
My Site:
http://www.netxpertsolutions.com/