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This will have a need for versioning per language and it means that all features may not be available in all languages at a point of time. A later release can be planned with a next feature release.
Alternative option 2: Release the language with the feature available in English. Even if some of the phrases or words in the feature are translated, we release it in English. “Translation in progress” label can be shown against an incomplete feature without blocking the release.
Please add more suggestions if you have.