Multiple languages
4: a (A!, ah!, etc. in all the above), o (English O!, Esperanto ho!, French ô!, etc.; also the Georgian vocative case suffix -ო -o), mi (English me, Tok Pisin mi, Esperanto mi, Dutch mij, Croatian me ~ mi), mama (Georgian მამა mama 'father'; most of the other languages above mama, maman, etc. 'mother')