This is the Chinese - Simplified (中文 - 简体) language pack and it includes display, help, and proofing tools for the Chinese (Simplified) language. https://support.microsoft.com/zh-cn/office/install-the-chinese-simplified-language-pack-for-64-bit-office-1ef1f710-28f3-49c0-ab4e-128ededc4d41?ui=zh-cn&r