A subtitle on two lines doesn’t break at the right place. In Project Info I can enter the words only on one line, and clicking on the words in Engrave or Write mode only brings up the {@ProjectSubtitle@} token. This is the subtitle:
Or even just Shift-X text on a random spot in the score, type it, copy, then delete the text item again. I also use this quite regularly for the Dynamics Prefix/Suffix properties which ignore diacritics and punctuation if you directly type those in.