About [[Wikimedia:Wikipedia-ios-share-article-name-on-wikipedia/ja]]
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Fragment of a discussion from Translating talk:WikimediaMobile
But that would be customisation, rather than translation, so it's forbidden (see Localisation guidelines). YOu make a good point, though: can you please report the issue so that it's addressed for everyone?
Thanks Nemo for following up. Now it's on a Phabricator's task.