[Improvement]: Typos in en.ts and zh.ts

[zhongqishang]

Search before asking

• [X] I have searched in the issues and found no similar issues.

What would you like to be improved?

• Use camel case naming
  • addgroup -> addGroup
  • ...
• Typo partiton -> partition
• Typo welecomeTip -> welcomeTip
• Duplicate optimizergroup ...

How should we improve?

No response

Are you willing to submit PR?

• [ ] Yes I am willing to submit a PR!

Subtasks

No response

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[chouchouji]

Can you make a detailed list? I will submit a pr to fix.