She grew up speaking fluent Spanish and English, but I often observed her using code switching with her parents and siblings. Another example is her younger sister, she understands Spanish and English but never speaks Spanish. Interestingly enough, when her father speaks to her in Spanish, she understands him perfectly and responds in English. It's very nice to hear them all talking to each other in their own way, in both languages. It would be interesting to see my friend's family learn the concept of code switching as they use it naturally without