Custom page title translation (ojs.3.1.2.1)

In OJS 3.1.2.1, in Settings > Website > Navigation menu > Add item, we created a Custom page whith an English title and an Italian one, but OJS always shows the italian title in the backoffice although we select English language (from Navigation menu), and the same happens in the front-end.
https://riviste.unimi.it/index.php/SSMD
@ctgraham @NateWr
Do you think that the solution in Navigation Menu Item Edit - Custom NMIs lose title after submitting form with same title · Issue #4709 · pkp/pkp-lib · GitHub or in How to insert hyperlinking anchors throughout an OJS 3.1.2 site (system links inclusive)? - #33 by ctgraham for the “pageTitleTranslated” part can be useful?