Steps to replicate the issue (include links if applicable):

• In the code for a MultiselectLookupLanguageSelector (for instance the one added here), add a definition for menuItemSlot, like the one used for a LookupLanguageSelector (like here)

What happens?:

• Nothing – the display of the languages in the list is not changed at all

What should have happened instead?:

• The labels for each language in the list should be changed according to how you define it.

Additional info:

• In Manual:LanguageSelector, menuItemSlot is only documented for LookupLanguageSelector
• In factory.js, however, the function documentation for MultiselectLookupLanguageSelector also mentions menuItemSlot
• MultiselectLookupLanguageSelector.vue doesn't seem to have a slot for this, whereas LookupLanguageSelector.vue does