This returns language names and article titles in many languages (which is used to construct a language switcher interface on the mobile web interface). To do that properly, mobile we need to identify which languages are RTL and which are not.
Expected: Return an rtl property when a language is RTL.
Note: MobileFrontend is forced to workaround the lack of this directionality and ships a list of language codes that are considered RTL incurring technical debt. Blocked on T190129