Technical reviews and user feedback from translation forums suggest the following:
Based on available information, is an archive file typically associated with visual novel (VN) translation patches , specifically for the game Night Voices . File Overview vntNV1.7z
Always run the archive through a service like VirusTotal before extracting. Technical reviews and user feedback from translation forums
Because this is a community-distributed patch rather than an official update: vntNV1.7z