Hi Fernando. I don't think it's the language which is the problem here but rather Google's ability to recognise SEQUEmatic. Even in English I have a hard time with this.
I think the solution is for me to give it a different name in the Google Assistant so that it's something it can recognise. I'm yet to decide what that alternative name would be.
So you're aware, the only thing you can do with the assistance action is trigger a sequence. Can you try creating a routine which is triggered by something in Spanish but the runs the command in English?