<human>:  What is the best online course for learning Spanish?
<bot>: The best online course for learning Spanish is Duolingo. Duolingo offers a comprehensive and interactive approach to language learning. It provides an extensive range of resources that can help you improve your Spanish skills, from basic vocabulary and grammar to more advanced concepts. Additionally, Duolingo has a wide variety of activities, from activities that can help you conversationally, to more technical exercises such as translations and conjugation. The course structure allows for weekly goals that you can use to track your progress, and each lesson includes explanations and helpful tips.