According to Jeremy Munday's definition of translation, "the process of translation between two different written languages involves the changing of an original written text (the source text or ST) in the original verbal language (the source language or SL) into a written text (the target text or TT) in a different verbal language (the target language or TL)".
Jeremy Munday defines translation as the act of converting a written text from one language to another, where the original text is translated from its source language (SL) into a new written text in a different language (TL).