I'm not sure I understand.
My question is not whether names are written the same way in the same alphabet. Of course sometimes they aren't.
My questions is also not whether the idea of fallback by script is good. It is to be discussed in Wikidata discussion pages.
My questions is whether a code like mul-latn is valid. Is it standard to use "mul", which is a somewhat special code with a script code? The codes sr-latn and sr-cyrl are clearly valid, but sr is a usual language code, whereas mul is a bit different. So can mul be used in such a context just like a code for an actual language? Does anyone know for certain?
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Amir Elisha Aharoni · אָמִיר אֱלִישָׁע אַהֲרוֹנִי
http://aharoni.wordpress.com“We're living in pieces,
I want to live in peace.” – T. Moore