Speech Synthesis plugin: changing voice URI

Hello everyone!

I am working on a children's game. The game was created in Construct 2 and then we switched to Construct 3.

In Construct 2 using UserMedia Plugin, TTS function worked perfectly, but when I switched to Speech Synthesis Plugin in Construct 3 it stopped working.

The problem is that TTS now only works with a default female voice and in English. I need to change this voice from URI to Spanish, but I tried many possible solutions, but now I am stuck ...

Thanks in advance...