Final answer:
The Spanish language changed over time primarily due to the influence of Arabic during the Arab conquests and the contact with indigenous languages during the colonial period. Modern interactions have also led to the adoption of some English syntax and vocabulary.
Step-by-step explanation:
The Spanish language has evolved over time due to various factors, including the influence of indigenous languages, the introduction of Arabic vocabulary, and contact with other languages including English. During the Arab conquests, Arabic and Spanish coexisted in Spain until the Christian kingdoms reconquered the territory, which led to a significant Arabic influence on Spanish vocabulary. Additionally, the processes of colonialism and imperialism affected indigenous languages in the Americas, with Spanish replacing many local languages as European powers established control. This lent some indigenous vocabulary to the Spanish language. In modern times, the interactions and proximity of English-speaking and Spanish-speaking communities have led to some adoption of English syntax and vocabulary into Spanish.