Final answer:
Transfer of learning is the spontaneous use of skills acquired in one context being applied to a new context, such as code-switching between languages or using mathematical problem-solving for practical issues.
Step-by-step explanation:
The spontaneous use of skills that are learned in one context in a different context is referred to as transfer of learning. This concept is an important aspect of education and cognitive development. It involves applying learned strategies or skills to new situations without explicit teaching or prompting in that new setting. For instance, code-switching is a demonstration of such skill transfer, where an individual alternately uses different languages or language forms depending on the context. Another example would be using problem-solving skills learned in mathematics to address a real-world issue, thus showing the utility and adaptability of academic learning in everyday practical living.