Does Voicer work with Multilingual site?

You can select only one language and voice in the plugin settings but start from plugin version 3.0 it also works with multilingual sites and supports the WPML plugin.

To enable multilingual support, go to Voicer>General>Multilingual support 

The Site locale will be used to generate speech. For all languages, except for the one selected in the plugin settings, the Standard-A voice will be used. The plugin can only speak languages that are available on Google Cloud.