fix: localize 404 page fix #1987

[yamashita-ki]

Summary

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
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Other information:

[yamashita-ki]

Hey @meteorlxy
Would you mind checking this one?

[ulivz]

I just checked the preview link, but found an obvious flash (from en to zn)

[yamashita-ki]

@ulivz
I would like to ask you two things.

I just checked the preview link, but found an obvious flash (from en to zn)

So, 404 page supports i18n without my commit?

obvious flash

flash means session flash?