use "translator" alias not "translator.default"
merged branch tecbot/patch-1 (PR #9092)

This PR was merged into the master branch.

Discussion
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use "translator" alias not "translator.default"

Validator is the only instance which references to the "translator.default" service. It should reference to the "translator" service so the validator can use a custom validator if the user overwrites the "translator" alias.

Commits
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9e38819 use "translator" alias not "translator.default"