Unified Romance language in an unconquered Visigothic Kingdom?

If the Visigothic Kingdom would have not been conquered by the Umayyads in 711 (best scenario: Arabs do not expand outside Arabia in the 7th century) and remained as a unified political entity (it means, the whole Iberian peninsula is ruled by them) for some time, which consequences this scenario would have had for the linguistic map of Iberia?

IOTL the fragmentation of the Christian kingdoms in the North after the Arab conquest produced different language/dialects based on the vulgar Latin spoke in the mountain (isolated) regions. This scenario also helped the Basque language to survive.

But, if this would haven't happened, the prevailing vulgar Latin forms would have not been the same as IOTL, but probably the Latin spoke in the urban areas and populated plain/great valley/coastline regions.

My questions are the following:

- Would a unified Romance Language surge or despite the political unification, different languages would emerge (maybe based on provincial dialects)?
- Would the Basque language survive under these conditions?
- Would this process be affected if by the 9th century the (Carolingian) Franks might have incorporated the Visigoths to the Empire like they did IOTL with the Lombards?
- Would the Gothic language have any chance to survive somehow?
 
- Would a unified Romance Language surge or despite the political unification, different languages would emerge (maybe based on provincial dialects)?
Probably : as I pointed elsewhere, Visigothic Kingdom was undergoing a clear crisis by the early VIIIth that a strong Francia will benefit to intervene (as it did historically in 632 for exemple) in succession matters, probably by taking off directly or indirecltly a presence in the "Eastern Kingdom".

Eventually, I think you'd have at least an important Gallo-Roman or Occitano-Roman influence in Transpyrenean regions, more or less comparable to IOTL Occitano-Roman influence on eastern part of the peninsula.

As for Galaico-Portuguese, it could be a quite distinct dialect (akin to Asturian IOTL compared to Castillan) but you could make a case about how much it could be tied up with the rest of Hispano-Romance continuum.

- Would the Basque language survive under these conditions?
I don't see why not. In fact, without Hispano-Romance early medieval centers in northern Spain, you could make the argument that it could make Basque area contraction less important in the North-West.

- Would this process be affected if by the 9th century the (Carolingian) Franks might have incorporated the Visigoths to the Empire like they did IOTL with the Lombards?
Rather than incorporated as Lombards were IOTL, I'd rather see sort of mix between a vassalisation à la Bavaria and a protectorate such as Theodoric enjoyed over Spain. Meaning you'd have your lot of Frankish nobility in the eastern part, so as said above, probably a yes.

- Would the Gothic language have any chance to survive somehow?
Gothic language was essentially ceremonial anyway, at least since the Vth century. So it did died out as an everyday language already in Spain.
 
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