<human>:  I'm interested in learning Spanish. Please recommend some free online courses.
<bot>: I recommend you try Duolingo, which is a free and interactive language learning platform. It offers Spanish courses ranging from beginner to advanced levels. You can also find plenty of free Spanish lessons on YouTube, such as SpanishDict's YouTube channel or Easy Spanish by Curso de Español. There are also several free Spanish language courses available at SpanishPod101.com.