All translations are done on transifex. https://explore.transifex.com/python-doc/

Maintained versions:

Version	Sync status	Translation progress
3.15
3.14
3.13
3.12
3.11

EOL versions:

Version	Sync status	Translation progress
3.10
3.9
3.8
3.7

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You signify acceptance of this agreement by submitting your work to the PSF for inclusion in the documentation.

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You're recommended to read 大陆简中自由软件本地化工作指南：Free Software Localization Guide for Chinese (China) first.