Why is bullfighting a tradition in many Spanish speaking countries?
As the Spanish Empire grew, the bullfight was introduced into newly conquered countries. That is how it came to Mexico and many countries in Central and South America.
Bullfights in the Spanish tradition are held in many other countries - Mexico, France, Portugal, several South American and Central American countries. There are also other types of 'bullfighting or bull taunting held in many other places in the world but bear no resemblance to the traditional Spanish fight. Spanish bullfights (bloodless) have even been held in the United States but have not met with much success.
There are some areas of MOROCCO and all of WESTERN SAHARA that were previously Spanish colonies and have significant minorities of Spanish speakers. The majorities speak local dialects of Arabic which have a few words of Spanish origin, like "cocina" (كوسينا) for kitchen instead of the Arabic word "matbakh" (مطبخ), but to say that these languages "contain" Spanish would be a bit of an overreach. The number of loanwords is roughly 5%. In terms of…