In many cultures, the predominant language is often the one spoken by the majority.

predominant 由前缀 pre-（表示"在前"）和 dominant（主导的）组成，字面意思是"在主导地位的"，引申为"主要的、占优势的"。这个词强调某种语言在文化中占据主导地位或最普遍使用的状态。