In recent years Emoji (Images which are treated as text by computers, represented in the extended unicode range) have entered the common parlance of the English language.
But now I'm confused
According to Wikipedia it's a Japanese word, appropriated into English, so it doesn't follow the typical pluralisation rules of Latin-rooted words (for instance, the plural of radius is radii), so we can't use 'emojus' as a singular.
Is 'Emoji' singular, plural or both? If it's only one, what is the other form?