I'm afraid, ScriptVocalizer is a Text To Speech module.
You need to give the script in your specific language to convert into speech.
However, you can use Google Translate to translate your scripts and use that translated scripts inside ScriptVocalizer. ScriptVocalizer accepts texts/scripts translated by Google Translate.
You may checkout this support article which includes a work demo in which we used Google Translate to translate our script from English to Chinese and used that translated script in ScriptVocalizer to create Chinese Speech: How Can I Use Other Traditional Language Scripts In ScriptVocalizer? [Chinese Script Demo]