[Validator] added Japanese translation for ISSN message
merged branch 77web/validator-translation-ja-issn (PR #7783)

This PR was merged into the master branch.

Discussion
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[Validator] added Japanese translation for ISSN message

| Q             | A
| ------------- | ---
| Fixed tickets | N/A
| License       | MIT

Commits
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95030ec [Validator] added Japanese translation for ISSN message