parallel text
noun
One of two or more versions of a literary work, etc., printed in a format which allows direct textual comparison, often on facing or consecutive pages of the same volume; a text containing different versions of the same work (e.g. in its original language and in translation) set out in such a way.
Origin
Late 19th century; earliest use found in Frederick Furnivall (1825–1910), textual scholar and editor.