Enable language support for Korean

[jihoon-seo]

What type of PR is this?

/kind feature

What this PR does / why we need it:

This PR enables language support for Korean.
(FYI: Korean-localized string files already exist in locales/ko)

Which issue(s) this PR fixes:

Fixes #4269

Special notes for reviewers:

Does this PR introduced a user-facing change?

None

Additional documentation, usage docs, etc.:

[ks-ci-bot]

Hi @jihoon-seo. Thanks for your PR.

I'm waiting for a kubesphere member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[donniean]

/approve

/lgtm

[ks-ci-bot]

LGTM label has been added.

Git tree hash: c51615ae230b2805b9c4de25cecc352bed8c7070

[ks-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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This pull-request has been approved by: donniean, jihoon-seo

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