Solomon Katz has written:

'The Jews in the Visigothic and Frankish Kingdoms of Spain and Gaul' -- subject(s): Jews in Gaul, Jews in Spain, Jews, History

Because the Muslim who conquered Spain in 711were tolerant of both Jews and christian. so the Jews can flourish in Spain and developing their culture, so Jews didn't have to worry about begging prececuted.

They did not need to flee. Spain was never occupied, nor did it have to surrender its Jews.

The Moors and the Jews were expelled from Spain and Portugal in the 1490s.

Jews in Medieval Spain spoke Spanish and Ladino. They also used Hebrew in prayers.