当然，仍处于开发阶段并依赖于供应商的实施，但正如您所看到的，Chrome 已经支持了一个不错的列表。（Chrome 是目前唯一支持此功能的）。
有关语言，请参阅此演示：Google Speech。
这是他们支持的语言的javascript：
var langs =
[['Afrikaans', ['af-ZA']],
['Bahasa Indonesia',['id-ID']],
['Bahasa Melayu', ['ms-MY']],
['Català', ['ca-ES']],
['?eština', ['cs-CZ']],
['Deutsch', ['de-DE']],
['English', ['en-AU', 'Australia'],
['en-CA', 'Canada'],
['en-IN', 'India'],
['en-NZ', 'New Zealand'],
['en-ZA', 'South Africa'],
['en-GB', 'United Kingdom'],
['en-US', 'United States']],
['Español', ['es-AR', 'Argentina'],
['es-BO', 'Bolivia'],
['es-CL', 'Chile'],
['es-CO', 'Colombia'],
['es-CR', 'Costa Rica'],
['es-EC', 'Ecuador'],
['es-SV', 'El Salvador'],
['es-ES', 'España'],
['es-US', 'Estados Unidos'],
['es-GT', 'Guatemala'],
['es-HN', 'Honduras'],
['es-MX', 'México'],
['es-NI', 'Nicaragua'],
['es-PA', 'Panamá'],
['es-PY', 'Paraguay'],
['es-PE', 'Perú'],
['es-PR', 'Puerto Rico'],
['es-DO', 'República Dominicana'],
['es-UY', 'Uruguay'],
['es-VE', 'Venezuela']],
['Euskara', ['eu-ES']],
['Français', ['fr-FR']],
['Galego', ['gl-ES']],
['Hrvatski', ['hr_HR']],
['IsiZulu', ['zu-ZA']],
['Íslenska', ['is-IS']],
['Italiano', ['it-IT', 'Italia'],
['it-CH', 'Svizzera']],
['Magyar', ['hu-HU']],
['Nederlands', ['nl-NL']],
['Norsk bokmål', ['nb-NO']],
['Polski', ['pl-PL']],
['Português', ['pt-BR', 'Brasil'],
['pt-PT', 'Portugal']],
['Român?', ['ro-RO']],
['Sloven?ina', ['sk-SK']],
['Suomi', ['fi-FI']],
['Svenska', ['sv-SE']],
['Türkçe', ['tr-TR']],
['?????????', ['bg-BG']],
['P??????', ['ru-RU']],
['??????', ['sr-RS']],
['???', ['ko-KR']],
['??', ['cmn-Hans-CN', '??? (????)'],
['cmn-Hans-HK', '??? (??)'],
['cmn-Hant-TW', '?? (??)'],
['yue-Hant-HK', '?? (??)']],
['???', ['ja-JP']],
['Lingua lat?na', ['la']]];