Only a Star Wars title could have stirred so much controversy over grammar. Everyone has Star Wars: The Last Jedi under a great deal of scrutiny, from the meaning of the red font, to whether the word Jedi in the title refers to one or more individuals, as it can be taken as singular or plural.
Putting the discussion to rest, Lucasfilm just released the title in countries where the singular and plural of the word actually have different spelling. Because of this, we now know that the title is supposed to mean more than one Jedi, as in, Luke and Rey... and maybe more besides.
Check out below the french title: