There is nothing ULS can do here: there is no entry point to change language or access settings, there is nothing to type. One exception would be loading web fonts. But I would argue that that is a small set of users, who can use Special:ApiSandbox or the wiki help pages. Bug: T145186 Change-Id: I71de2a58f007ff03b01c9edc5ed6bed0e6524c4e