That sounds reasonable, except for the fact that many, if not most, of the modern European national languages are in fact, newfangled mashups. National language standards are by and large the invention of the past few hundred years, where they either took a single regional language and called it the language language (such as French) or they kind of "mashed up", artificial standard (such as German). And yet somehow, these languages eventually took hold.
If Romansch doesn't die out in the next century, it's highly likely that a single standard will emerge.
We have put activities in place to try to save Mirandese.
In Spain likewise, after the civil war, regions got active to ensure their local languages strive alongside Spanish.
In Germany some states have the option of children having after school activities in the regional dialects.
https://www.sk-kultur.de/inhalte/themen/akademie-foer-uns-ko...
An initiative to teach Bavarian in the schools
http://m.spiegel.de/lebenundlernen/schule/bayerisch-lehrer-i...
There are similar initiatives for other dialects.
Sorry they are in German, just wanted to provide direct links, instead of Google translate.
[1] This is not too different from the situation with High German being used in education even though everyone speaks in dialects.
The people are speaking their own dialects which differ that much that you can easily locate from which part of the country the speaker is from.
The native German Swiss only speak their Swiss German dialects among each other, with no single one dominating. In writing OTOH, standard German is used, although of course the usage of standard German has a much longer history than in the case of Romansh.
Italian German, French, an yea, e'en English, have mutually all-but-unintelligible variants.
Well heck, the same thing can almost be said of German.