Telegram does not include Simplified Chinese by default. To use a Chinese interface, you can apply a Telegram language pack.
Simplified Chinese
https://t.me/setlanguage/zhcncc
Open the link on a device with Telegram installed, then confirm the language change in Telegram.
Traditional Chinese
Hong Kong:
https://t.me/setlanguage/zh-hant-raw
Taiwan:
https://t.me/setlanguage/zh-hant-beta
FAQ
Does Telegram include Simplified Chinese by default?
No. A Chinese language pack is normally required.
Do I need to install another app?
No. Open the language-pack link and apply it directly in Telegram.
Will changing the language affect my Telegram account?
No. It only changes the interface language and does not affect chats, contacts, groups or account information.
Can I switch back to English?
Yes. Open Telegram language settings and select English again.
Does this work on iPhone, Android and desktop?
Yes. Open the language-pack link on the device where Telegram is installed and follow the prompt.