Lets assume that the crowns of the Spanish kingdoms and France end up united around the 15th-16th centuries. I know it wouldn't make sense for the politics, but I'm thinking something like Joanna of Castille marrying Charles VIII of France. The specifics don't matter, but the point is that, by the end of the 16th century, one crown is ruling the modern nations of France, Spain, Portugal, and Italy (the latter two extrapolated how easily a Franco-Spanish monarchy would likely dominate both). Let us also assume that such a unified monarchy holds together for several centuries.
What interests me is what would happen to the various languages spoken, when almost all of the Western Romance languages are in one country. Of course, it is not until much later on that we see efforts to standardize language (18th and 19th century, really). But when that point comes, and we have a variety of related languages and dialects (I started to compile a list, and then realized how futile that would be in this situation), what comes out on top?
Of course, there will likely be some classicists insisting on using some form of Latin, but that seems quite unlikely outside of formal documents. I also think it would be difficult for any one language to dominate over the others. That leaves a hodgepodge of various dialects of what we recognize as the Romance languages, perhaps all bleeding into each other slightly. Or, perhaps an effort is made to support some sort of constructed language bridging them.
What interests me is what would happen to the various languages spoken, when almost all of the Western Romance languages are in one country. Of course, it is not until much later on that we see efforts to standardize language (18th and 19th century, really). But when that point comes, and we have a variety of related languages and dialects (I started to compile a list, and then realized how futile that would be in this situation), what comes out on top?
Of course, there will likely be some classicists insisting on using some form of Latin, but that seems quite unlikely outside of formal documents. I also think it would be difficult for any one language to dominate over the others. That leaves a hodgepodge of various dialects of what we recognize as the Romance languages, perhaps all bleeding into each other slightly. Or, perhaps an effort is made to support some sort of constructed language bridging them.