AO3-6792: fix logic to account for the fact that language_params can be blank

[Cesium-Ice]

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Issue

https://otwarchive.atlassian.net/browse/AO3-6792

Purpose

What does this PR do?

Fix bug that QA found

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[Bilka2]

The code looks good, however could you update the two support/abuse related tests in features/admins/admin_languages.feature to use the support/policy_and_abuse admin roles (instead of translation) so that we test this case?

[Bilka2]

Thank you!