[BRX]

I have thought about multiple titles quite a long time. If you're interested in my solution with the available means: I use one of the custom fields for the alternative titles. The main title is in the normal title field, the secondary ones in the custom one (with a delimiter if necessary).

For the secondary title I create a placeholder entry (only a single one even if there are several songs with identical titles)

Finally I use the subtitle to display the other title from the custom field starting with a =>

So it's not an automatic referral but 1 manual step more. But it's the best I could think of and it makes do.