Learn Thai
as it's spoken on the street.

Central Thai, the dialect spoken in Bangkok, is the national standard: what is taught in schools, used in media, and understood everywhere in the country. It is also one of the more immediately rewarding languages to put real effort into, because Thai people are consistently, genuinely appreciative of foreigners who try.

The core challenge is tonal. Thai has five tones (mid, low, falling, high, rising), and the same syllable said with a different tone is a genuinely different word. Getting close on tone matters more in Thai than in almost any other language StreetTongue teaches, which is why pronunciation scoring carries more weight in the Bangkok module than in most others.

The other adjustment is systemic: no verb conjugation for tense (time words carry that job instead), no plural forms (context does the work), and politeness particles, ka for female speakers and krap for male speakers, that end nearly every polite sentence. Thai script is the only fully reliable pronunciation guide. The various romanization systems in guidebooks and apps are inconsistent enough to actively mislead a beginner.

None of this is a reason to hesitate. Thai rewards a genuinely modest amount of focused effort with an outsized warmth in return, and Bangkok, as the standard dialect city, is the right place to build that foundation.