<human>:  How can I learn English as a second language in an affordable way?
<bot>: One of the most affordable ways to learn English as a second language is to take advantage of free or low-cost online resources. There are many websites dedicated to teaching English, such as Duolingo and BBC Learning English. Additionally, there are many YouTube channels that offer lessons in English on the basics of grammar and pronunciation. Finally, you can look for local language learning centers or ESL classes offered through your school or local library.