Changing the "Complete" button

I have a problem with the “Complete” button using pavlovia surveys. I want to change all the buttons text to spanish, which I do editing the JSON, however this only works for the back and next button, while the complete button still says “Complete” although I have changed it in the JSON.

This is what I have at the end of the JSON code:

 "showProgressBar": "top",
 "showTOC": true,
 "pagePrevText": "Atrás",
 "pageNextText": "Siguiente",
 "completeText": "Enviar",
 "widthMode": "responsive"