Final answer:
Castilian twists refer to the regional variations of Spanish language across the Americas, influenced by local factors such as indigenous languages and different colonial histories. An example is the use of 'vos' instead of 'tú' in certain countries.
Step-by-step explanation:
When the narrator mentions that each country has "Castilian twists," they are referring to the regional variations that developed in the Spanish language as it spread across the Americas. Castilian Spanish, originating from the Iberian Peninsula, evolved differently in various New World territories due to a mix of factors including indigenous languages, isolation, and differing patterns of settlement.
An example of a Castilian twist is the use of vos instead of tú for the second person singular in countries like Argentina and Uruguay, a feature known as 'voseo'. Additionally, local vocabulary words such as 'guagua' for bus in Andean countries reflect native influences on the regional forms of Spanish.