In the context of bilingualism, which of the following refers to a language that is used frequently at home?

The term that refers to a language used frequently at home is the heritage language. Heritage language is commonly spoken by individuals or communities who have ancestral ties to a specific language, meaning it may be the language that they grew up hearing and using within their family and cultural context. This language often holds personal significance and can be a key aspect of one’s identity.

In the context of bilingualism, the heritage language serves as a bridge linking individuals to their cultural roots, traditions, and family history. It plays a crucial role in maintaining cultural heritage and can enhance the individual's sense of belonging within their community.

Other options like target language typically refer to the language being learned or studied, dominant language denotes the language that is most frequently used in broader society, and CUP (Common Underlying Proficiency) is a theoretical framework for understanding how bilingualism operates cognitively, but none represent the language actively used in the home environment as explicitly as heritage language does.