The Thai block contains characters used in the Thai script, which is used for writing the Thai language and several minority languages in Thailand. The Thai script is an abugida, but it differs from others in that it has a more complex set of vowel signs that can appear before, after, above, or below a consonant. This block includes vowels, consonants, numerals, and various diacritical marks that indicate tones, which are crucial in Thai as it is a tonal language. The script has a long history, with roots in the Old Khmer script, and is essential for all forms of written communication in Thailand..