kimteany

Greetings all... i just need guide or opinion from all.. i need to develop the compiler word for short form words to full words.. example: B4U ---> before you so what kind of technique can i implement for this?? it is decision tree??or else? or what kind of programming language that can i use to develop this?? C#??C++?? or JAVA? hope anybody could give opinion..and help me. many thanks.