Duke Language School | Thai Language School Bangkok

Education · Watthana

อาคาร เทรนดี้ 10/63 Soi Sukhumvit 13, Khlong Toei Nuea, Watthana, Bangkok 10110

Rated 4.8/5 from 481 reviews.

Data checked on 23 May 2026.

Duke is the go-to recommendation for Bangkok expats who want functional Thai rather than rote memorization. Nine structured levels, a free trial class, and Ministry of Education approval for ED visa support make it the practical full-stack choice. The Soi 13 Trendy Building location puts you five minutes from Nana BTS, and flexible scheduling means the course fits around a working life.

Five minutes on foot from Nana BTS, on the third floor of the Trendy Building on Sukhumvit Soi 13, Duke Language School has built a reputation as the Thai language school that actually gets expats speaking. The approach moves away from rote-learning methods and toward interactive, audio-visual instruction focused on the Thai that Bangkokians use in real conversations every day.

The curriculum runs across nine levels. The first three concentrate on spoken communication, building the vocabulary and tonal confidence you need before reading and writing enter the picture from level four onward. Each level is structured around group classes of roughly 40 hours, running five days a week for two hours per session. Tuition is priced at approximately 8,000 THB per month, and a 500 THB book fee covers each course level.

Scheduling is one of the school's strongest practical advantages. Morning, afternoon, and evening time slots are available, alongside weekend options, which means the course can sit alongside a job, a freelance schedule, or a busy social calendar without forcing trade-offs. Private lessons are available at 1,200 THB per hour for anyone who wants to move faster or focus on specific vocabulary areas like business Thai or professional communication.

For those planning a longer stay in Thailand, Duke holds Ministry of Education approval to support Non-Immigrant ED Visa applications. Enrolling in their eight-month or fourteen-month program provides the documentation needed for visa purposes, making the school a legitimate legal pathway for expats who want to extend their time in the country while building a real language skill.

Instruction is fully in English, removing the barrier that stops many beginners from committing to a Thai-medium school. A free trial class is available, giving you a real sense of the teaching style and class atmosphere before any financial commitment. At a 4.8 rating from 481 reviews, the consistency speaks for itself.