Hi Louise, the title of the exhibition is not in a single language but was arrived at by members of the Pacific Islands Advisory Group (PIAG) who represented Melanesian, Polynesian and Micronesian communities living in Melbourne (and further afield, too). Together they arrived at a title that they were all happy with.
Regarding particular languages: The Pacific contains hundreds of languages and dialects. Papua New Guinea alone has something like 800 languages; Polynesia has variants within it (Tongan Maori, New Zealand Maori etc). The regional groupings include the following islands.
Melanesia : Papua New Guinea, Solomon Islands, Vanuatu, New Caledonia, West Papua, Fiji
Polynesia: Aotearoa New Zealand, Tonga, Samoa, Tuvalu, Tokelau, Cook Islands, Hawaii, Society Islands, Austral Islands, Marquesas Islands, Tuamoto Archipelago, Mangareva, Easter Island.
Micronesia: Pelau, Mariana Island, Marshall island, Kiribati.
So this was a considerable task, but the PIAG ensured that everyone who participated agreed upon the title.