refactor: Improved some translations

[Xiaokang2022]

For reviewers

• I did not use AI
• I used AI and thoroughly reviewed every code/docs change

Description of the change

Improved some of the Chinese and Japanese translations. Since I cannot guarantee the accuracy of the remaining untranslated content, I did not translate everything.

Relevant resources

1. class:
   • zh: https://docs.python.org/zh-cn/3/glossary.html#term-class
   • ja: https://docs.python.org/ja/3/glossary.html#term-class
2. type alias:
   • zh: https://docs.python.org/zh-cn/3/glossary.html#term-type-alias
   • ja: https://docs.python.org/ja/3/glossary.html#term-type-alias
3. type parameter, bound or constraints:
   • zh: https://docs.python.org/zh-cn/3.12/whatsnew/3.12.html#pep-695-type-parameter-syntax
   • ja: https://docs.python.org/ja/3.12/whatsnew/3.12.html#pep-695-type-parameter-syntax

[pawamoy]

Thanks you!