How to change region in an already started project

How to change region in an already started project.
i started my project with 2 region english and italian
but i need only italian and when i publish to alexa after the welcome message it say only hello word,but from voiceflow it works

first, you can change region settings in publish tab. just remove english from there.

then change messages to italian in your blocks.

if you already published your skill to the store before, you should publish and be certified again.

thank you very much, with your instructions I managed to make the skill work