4. The translation device according to claim 3 , wherein the instructions are executable to: determine character sizes of the plurality of extracted lines; and determine the predetermined distance threshold and the predetermined character position threshold in accordance with the determined character sizes.
3. The translation device according to claim 2 , wherein: the separation condition includes: a fourth condition that a difference in character size between the two consecutive lines exceeds a predetermined character size threshold; a fifth condition that a distance between the two consecutive lines exceeds a predetermined distance threshold; a sixth condition that the two consecutive lines differ from each other in color of characters; and a seventh condition that positions of respective initial characters of the former line and the latter line of the two consecutive lines are different from each other in a line direction of the character string, by more than a predetermined character position threshold; and the instructions are executable to determine whether or not at least any one of the fourth to seventh conditions of the separation condition is met.