What is meant by the source language and the target language?
These terms are normally used for the translation of documents. The source language is the language of the original document or text to be translated. The target language is the language into which the original document is to be translated. When the terms are used for interpreting, the source language is the language of the original thoughts or sentences to be interpreted. The target language is the language into which the original thoughts or sentences are to be interpreted.