Bangla (can also be termed as Bengali) is one of the richest languages among all the languages exist in the world and one of the largely spoken languages in the world. More than 220 million people speak in Bangla as their native language. It is ranked sixth based on the number of speakers. Bangla is the mother language of Bangladesh and also a large number of people in eastern area of India (West Bengal and Kolkata as its capital) speak and write in Bangla. This book presents the adapting rule based machine translation from English to Bangla. The proposed language translation model relies on rule based methodologies especially fuzzy rules. There are "If - Then" basis rules are applied for the English to Bangla language translation. In this language translation, we use rough set technique for Knowledge Representation System. This technique is used to classify each English sentence to a particular class using attributes of that English sentence and then translate them to the Bangla sentence using the rules that is produced earlier in the language translation system. Here English to Bangla bilingual dictionary has been formed for the purpose of language translation.