Tell us what you are trying to do?
In the English pages of the site the title appear at the top of the page. In the original languague is not like this. How can I change this thing and delete the title translation?
1. Find and set the custom field to COPY as shown in the documentation URL above, then make a small change in the default language of that page and then re-save the translation and the title should disappear
2. While in the site's backend, change the language in the top bar to the language in which the title is still showing, then go to pages, edit the translation of that page with the page editor that you are normally using on the site (Elementor I think it is in your case), find and UNcheck that option.