Hi, you mean a language translation, this happens because the Bible was written in ancient times and the languages spoken then are no longer spoken. Also, the words have changed in the past a single word meant one thing but in modern times the same word means something completely different. So, this requires translations. Also, the Bible was written in one language making it available in several languages was a feat that they accomplished in the past so that the Bible can easily be read by all the people today. It is really awesome to have it written so commonly for all people.
