One of them is that all known lges without any exception have pronouns for at least the speaker and the addressee (the 1st person and the 2nd person)

Fijian has one of the largest pronoun systems of any lge. It has a singular form for each person, a dual form for 2 people, a trial form that refers to about three people, and a plural form that refers only to more than 3 people. In addtition, in the 1st person dual, trial and plural, Fijian has separate inclusive and exclusive forms.