The <Say> TwiML verb is able to properly pronounce words from over 25 different languages using a number of different Text-to-Speech (TTS) voices. Voices and languages are declared in your TwiML response using the <Say> verb's voice and language attributes. For help forming TwiML TTS responses, please see Twilio Docs: TwiML Voice - <Say>.
Man and Woman Voices
Twilio's basic Man and Woman voices support the following languages:
| Language | Value |
| English (American) | en |
| English (British) | en-gb |
| Spanish | es |
| French | fr |
| German | de |
| Italian | it |
Alice Voice
Twilio's basic Alice voice uses an improved engine that is capable of speaking 26 total dialects (18 languages and 14 locales):
| Language | Value |
| Catalan | ca-ES |
| Danish | da-DK |
| German | de-DE |
| English (Australian) | en-AU |
| English (Canadian) | en-CA |
| English (British) | en-GB |
| English (Indian) | en-IN |
| English (American) | en-US |
| Spanish (Castilian) | es-ES |
| Spanish (Latin American) | es-MX |
| Finnish | fi-FI |
| French (Canadian) | fr-CA |
| French (European) | fr-FR |
| Italian | it-IT |
| Japanese | ja-JP |
| Korean | ko-KR |
| Norwegian | nb-NO |
| Dutch | nl-NL |
| Polish | pl-PL |
| Portuguese (Brazilian) | pt-BR |
| Portuguese (European) | pt-PT |
| Russian | ru-RU |
| Swedish | sv-SE |
| Chinese (Mandarin) | zh-CN |
| Chinese (Cantonese) | zh-HK |
| Chinese (Taiwanese Mandarin) | zh-TW |
Amazon Polly Voices
Amazon Polly voices each support a specific language and locale. Polly voices are also fully customizable for pronunciations, speed, tone, and more. For more information, please see our article Getting Started with Amazon Polly Text-to-Speech.
| Language | Value | Voice |
| Welsh | cy-GB | Polly.Gwyneth |
| Danish | da-DK | Polly.Mads Polly.Naja |
| German | de-DE | Polly.Hans Polly.Marlene Polly.Vicki |
| English (Australian) | en-AU | Polly.Nicole Polly.Russell |
| English (British) | en-GB | Polly.Amy Polly.Brian Polly.Emma |
| English (Welsh) | en-GB-WLS | Polly.Geraint |
| English (Indian) | en-IN | Polly.Aditi Polly.Raveena |
| English (American) | en-US | Polly.Ivy Polly.Joanna Polly.Joey Polly.Justin Polly.Kendra Polly.Kimberly Polly.Matthew Polly.Salli |
| Spanish (Castilian) | es-ES | Polly.Conchita Polly.Enrique |
| Spanish (Latin American) | es-US | Polly.Miguel Polly.Penelope |
| French (Canadian) | fr-CA | Polly.Chantal |
| French | fr-FR | Polly.Celine Polly.Mathieu |
| Hindi | hi-IN | Polly.Aditi |
| Icelandic | is-IS | Polly.Dora Polly.Karl |
| Italian | it-IT | Polly.Carla Polly.Giorgio |
| Japanese | ja-JP | Polly.Mizuki Polly.Takumi |
| Korean | ko-KR | Polly.Seoyeon |
| Norwegian | nb-NO | Polly.Liv |
| Dutch | nl-NL | Polly.Lotte Polly.Ruben |
| Polish | pl-PL | Polly.Ewa Polly.Jan Polly.Maja |
| Portuguese (Brazilian) | pt-BR | Polly.Ricardo Polly.Vitoria |
| Portuguese (European) | pt-PT | Polly.Cristiano Polly.Ines |
| Romanian | ro-RO | Polly.Carmen |
| Russian | ru-RU | Polly.Maxim Polly.Tatyana |
| Swedish | sv-SE | Polly.Astrid |
| Turkish | tr-TR | Polly.Filiz |