[Improvement] Improve language key name and fix typo

[chouchouji]

Why are the changes needed?

Close #3251 .

Brief change log

How was this patch tested?

• Add some test cases that check the changes thoroughly including negative and positive cases if possible

• Add screenshots for manual tests if appropriate

• Run test locally before making a pull request

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)

[chouchouji]

@zhoujinsong

These three variables are same? If they are, I will remove two variables.

[zhongqishang]

These three variables are same? If they are, I will remove two variables.

I found four place and I suggest keeping the last two, they have singular and plural forms.

  optimzerGroup: 'Optimizer Group',
  optimizergroup: 'Optimizer Groups',
  optimizerGroup: 'Optimizer Group', --keeping
  optimizerGroups: 'Optimizer Groups',, --keeping

[zhongqishang]

And recommended to leave a space before and after the number.

  last1h: '最近 1小时',
  last12h: '最近 12小时',
  last24h: '最近 24小时',
  last7day: '最近 7天',

[zhoujinsong]

These three variables are same? If they are, I will remove two variables.

I agree with @zhongqishang.
We should keep the following variables only:

optimizerGroup: 'Optimizer Group',
optimizerGroups: 'Optimizer Groups',

[chouchouji]

These three variables are same? If they are, I will remove two variables.

I agree with @zhongqishang. We should keep the following variables only:

optimizerGroup: 'Optimizer Group',
optimizerGroups: 'Optimizer Groups',

Thanks for your review. I will fix it tonight.

[chouchouji]

@zhongqishang @zhoujinsong I had updated code. Please review. Thanks!

[zhongqishang]

LGTM.

[zhoujinsong]

Thanks for the work! @chouchouji
Thanks for the review! @zhongqishang