Which languages apart from Japanese, Korean and Javanese encode systematically the relationships between speaker, hearer and referent by means of grammar markers and special sets of vocabulary?
Various Australian Aboriginal languages have grammatical encoding of the kinship relationships between speaker/hearer/referent.
See: Blythe, Joe (2013), Preference organization driving structuration: Evidence from Australian Aboriginal interaction for pragmatically motivated grammaticalization. Language, 89:4, pp. 883-919.