Click on "Edit Languages" once you have your Kite finished in the language you want your Kite to be in.

In the new one that has been created click on the three dots.

Activate the "Set language" button to make it visible.

And choose the language into which you are going to translate your Kite.

If you want this language to be the main language, click on "Select as default".

And finally, by checking that you are in the Language Kite, you can now adapt all the content and text as you wish!
You can always select from here in which language you want to display your Kite.