Each character can have one digital voice, which you can assign in the Character Creator. (You can also adjust the pitch of the character’s voice.)
To have a character speak with a different voice (such as another language), then you can utilize the Copy Character function to create another version of the character that has a different voice.
Note that all the default characters that come with Plotagon use the default American English voices, Rod and Karen. Because you cannot edit these characters in the Character Creator, it is not possible to assign them different digital voices.
If you try to have a character with an English voice read a text that is written in Spanish, then the result will be English pronunciation and accent.