Merge pull request #938 from Bandwidth/VAPI-1193

VAPI-1193: Add Arabic and Chinese language support for SpeakSentence.

Author: ghilsdorf-bandwidth

site/docs/voice/bxml/speakSentence.mdx

@@ -34,7 +34,7 @@ To choose a specific voice by name, use the `voice` attribute.
 | Attribute | Description                                                                                                                                                                      |
 |:----------|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
 | voice     | Selects the voice of the speaker. Consult the `voice` column in the below table for valid values.<br/><br/>If the `voice` attribute is present, `gender` and `locale` are ignored. |
-| gender    | Selects the gender of the speaker. Valid values are `"male"` or `"female"`.<br/><br/>Default `"female"`                                                                            |
+| gender    | Selects the gender of the speaker. Valid values are `"male"` or `"female"`.<br/><br/>Default `"female"`. If the chosen gender does not exist for the region, the opposite gender will be used by default. |
 | locale    | Selects the locale of the speaker. Consult the `locale` column in the below table for valid values.<br/><br/>Default `"en_US"`                                                         |
 
 
@@ -64,6 +64,8 @@ The table below shows a mapping of our supported voices.  It also maps our voice
 | kenji     | ja         | male       | Takumi     |
 | nadiya    | ru         | female     | Tatyana    |
 | anatoli   | ru         | male       | Maxim      |
+| zeina     | arb        | female     | Zeina      |
+| zhiyu     | cmn-CN     | female     | Zhiyu      |
 
 ### Supported SSML Tags
 
@@ -90,6 +92,8 @@ Specifies the natural language of the content. If you use a voice with an `en_US
 
 Attributes:
  * `xml:lang`: specifies the language, accepted values are:
+   * `arb`: Arabic
+   * `cmn-CN`: Chinese, Mandarin
    * `da-DK`: Danish
    * `nl-NL`: Dutch
    * `en-AU`: English, Australian