An Islamic Romance ethnic group

French were such deeply Catholic that king who converts to Islam will be deposed and probably killed king. And even more impossible if it happens in 16/17th century.
Maybe John upon excomunication converts. But that would lead to Runnymede being less likely to be a compromise as it is OTL.
 
Ironically the best POD for this is probably preventing Abd al-Malik from winning his civil war. If Ibn al-Zubayr wins, and the Caliphate goes through an earlier fracturing, it won't have to centralize and rationalize itself in the way the Umayyads did, making Arabic the standard bureaucratic language amd codifying what we think of as Islam more securely with the construction of the Dome of the Rock, which was a highly ideological building.

No Abd al-Malik and the Caliphate fractures earlier, with more local variation on practice during the initial conquest stage persisting through inclusion into the Islamic World
 
-Normans of Sicily convert to Islam
-Saadi Morocco, in alliance with England, conquers the Canaries and/or Cuba. The population converts with time but keeps their language.
 
-Normans of Sicily convert to Islam
-Saadi Morocco, in alliance with England, conquers the Canaries and/or Cuba. The population converts with time but keeps their language.

I highly doubt that Spanish speaking population would convert to Islam. They were just too deeply Catholics to do that.
 
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