Locale Th Th

Reference data for the Thai (Thailand) locale — endonym ไทย (ไทย), written in the Thai script, left-to-right (LTR).

Identifiers

• BCP 47 tag: th-TH
• ISO 639-1: th
• ISO 639-3: tha
• Script: Thai (Thai)
• Region: TH (Thailand)
• Text direction: ltr — left-to-right (LTR)

Speakers (approximate)

• L1 (native): 27,000,000
• L2 (additional): 44,000,000
• L1+L2 (total): 71,000,000

Base locale

This is a regional variant of Locale Th 001 (Thai), the base/macro locale for this language.

Pluralization

CLDR plural categories for this locale: other (1 form).

• other — everything else (e.g. 0~15, 100, 1000, 10000, …)

See Unicode Messageformat for writing plural messages using these categories.

Translating into this locale

Apply Locale Th 001 with the conventions of Thailand.

• Calendar: the Buddhist Era is the official year (2569 is 2026); show the Gregorian year only when the audience is international. Months have Thai names (ตุลาคม).
• Currency and numbers: baht (฿ or บาท) after the amount; decimal point and comma thousands separator in common use; Arabic digits in UI.
• Names and titles: given name first, then family name; people are addressed by the first name with a title (คุณสมชาย); academic and professional titles are honored.
• Tone: polite, warm, and indirect; avoid blunt refusals.
• Content sensitivity: content about the monarchy is legally protected; avoid casual wording and check with a Thai reviewer.

Common pitfalls

• Using the Gregorian year only in Thai official forms.
• Using familiar titles or pronouns with strangers.
• The general pitfalls in Locale Th 001 also apply.

Learn more

• Locale for BCP 47 identifiers, locale-sensitive formatting, pluralization, and text-direction concepts that apply across all locales.
• Unicode Messageformat for writing plural/selection messages correctly for this locale's grammar.
• Unicode CLDR locale data for th-TH (https://cldr.unicode.org)