What are some legit language schools in Thailand for learning Thai and visa purposes?

There are numerous language schools in Thailand that can assist with learning Thai, especially for visa purposes. Recommendations include AUA Language School in Rajadamri, Duke Language School, and Kudos Study Centre on Koh Chang. Additionally, it's important to consider your location in Thailand, as options may vary widely. The intricacies of the Thai language, including its tonal nature, also suggest that practical exposure and support can significantly impact learning outcomes.