Commons talk:Translation possible/詳細

How can I add ja to Commons:Translation possible/lang template?

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I wish to add a transated ja page among those _Commons:Translation_possible_ pages; _Template:Commons:Translation possible/lang_ does not show ja or 日本語 yet. Could you process and put Commons:Translation_possible/詳細 where it should belong to? Thanks in advance, --Omotecho (talk) 22:43, 6 August 2019 (UTC)