On this page there is not a lot of discussion about the fact that these templates are different in each language. Also, there's no discussion at all about the fact that these templates are visual and not semantic: to an experienced edmitor in a given language each of them is meaningful, but to the MediaWiki software each of them is just one of out thousands of other templates.
These are the actual root causes for the difficulties of handling them.
MobileFrontend relies of the design of English Wikipedia's Ambox templates. This obviously doesn't work for other languages.
A better solution would be to give communities guidelines for using some common code in templates of this kind, for example HTML classes. This is far from being robust, because it relies on presence of people who know how to use HTML classes and who read user manuals in each of the 800+ wikis.
The real solution would be to make an extension that stores metadata of this kind about the article—unreferenced, notability, style, perhaps also "stub". Customizations for each language should probably be possible, but a basic set of "page issues" could be made that covers most languages' and sites' common needs. When we have this as an extension, MediaWiki would be able to read this information meaningfully, and present it appropriately on desktop, mobile and elsewhere. Editors would be able to change them in a more convenient and structured way, instead of memorizing template names.
This is the discussion that we really should be having, instead of hacking MobileFrontend around the current local templates in each wiki.