zh_tw-Lang-Pack-1.16v9 is a release file of the Minecraft resource pack Mods - Traditional Chinese Localization Resource Package, made for Minecraft 1.16.5. It was published on June 21, 2021 and is 3.8 MB in size. For the full description, screenshots and every other version, visit the Mods - Traditional Chinese Localization Resource Package resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.