change accent not working

[bakeiro]

When i try to change the accent atributte, simply doesnt work!, and i have no bad code because in the voice-element page in "me gusta la gasolina" example dont change the accent.
My personal computer is in spanish, and the accent sound in spanish, but at work, (deutsch computer) sounds in english accent,I try to change accent in but nothing change

[masonlouchart]

Using the master branch version it's working form me. I tried only with French and English. Is this issue still relevant?