Existing cultural differences can be referred to as "cultural diversity" or "cross-cultural differences." The source of these differences can be traced back to a variety of factors such as geography, history, repgion, and societal values.
For example:
"Cultural diversity adds richness to our world and helps us to understand and appreciate different perspectives."
"Cross-cultural differences can sometimes lead to misunderstandings, but it is important to embrace and respect them."
翻译：
"文化多样性丰富了我们的世界，帮助我们理解和欣赏不同的观点。"
"跨文化差异有时会导致误解，但重要的是接受和尊重它们。"