- Language: Äiwoo
- Alternate names: Reef, Ayiwo, Naaude, Aiwo, Gnivo, Nivo, Nifilole, Lomlom, Reef Islands, Reefs, Äiwo, Aïwo, Reef Islands-Santa Cruz Sub-Family
- Language code: nfl
- Language family: Austronesian, Malayo-Polynesian, Central-Eastern Malayo-Polynesian, Eastern Malayo-Polynesian, Oceanic, Temotu, Reefs-Santa Cruz
- Number of speakers: 7,926
- Vulnerability: Vulnerable
- Script: Latin script.
Although children are still learning Äiwoo, the language is in danger from rising sea levels. Speakers may need to move to Santa Cruz or Honiara to survive in the longer term, leading to an increase in the use of Pijin, and potentially the disappearance of the Äiwoo language.