Linked from
The 19 pages that link to Vulgar Latin, each with the reason it gives.
French languageRelated: Its spoken forms supplied the main linguistic foundation of French.
LatinRelated: Regional spoken Latin changed over centuries into distinct Romance languages.
Spanish languageRelated: Its regional speech forms supplied the foundation for Spanish.
BetacismRelated: Its regional varieties developed differing outcomes for Latin /b/ and /w/.