After #2336597: Convert path aliases to full featured entities gets in we must reduce the number of queries in PathFieldItemList as suggested in #2511968-47: Path field should fall back to language neutral aliases (also makes this happen for the form widget!):
@Berdir:
I'm wondering if this could be done like the main alias lookup. Look for both language specific and neutral alias in a single load, if there is more than one alias, prefer the one with the matching language.
@amateescu:
That would be very easy to do after #2336597: Convert path aliases to full featured entities since we'll be able to use an entity query with an OR condition on the langcode field