| voicestring | The tone to be used for reading out the text. Allowed values:  | 
| languagestring | Language used to read out the text. Allowed values: See the table “Supported voices and languages” below. Defaults to  | 
| loopinteger | Specifies number of times to speak out the text. If value set to  Allowed values: integer >= 0 (0 indicates a continuous loop) | 
| Danish value: da-DK | 
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| Dutch value: nl-NL | 
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| English — Australian value: en-AU | 
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| English — British value: en-GB | 
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| English — USA value: en-US | 
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| French value: fr-FR | 
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| French — Canadian value: fr-CA | 
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| German value: de-DE | 
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| Italian value: it-IT | 
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| Polish value: pl-PL | 
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| Portuguese value: pt-PT | 
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| Portuguese — Brazilian value: pt-BR | 
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| Russian value: ru-RU | 
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| Spanish value: es-ES | 
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| Spanish — USA value: es-US | 
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| Swedish value: sv-SE | 
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