[Chiuso] The /blog is added at the end of various URLS

Background of the issue:
I am trying to resolve an issue where the '/blog' is being added at the end of various URLs on my website. The website's template has been translated from English to Polish, and only the Polish language is used. However, the English language was not deactivated, causing a looping fallback mechanism. I deactivated English without deleting orphans in the database, but the problem persists. I need to stop this from happening in the future and delete the non valid URLs entirely or redirect all current non-valid URLs to their valid URLs. The issue can be seen on this page: link nascosto

There is a plan in non-defined future to have a n English site version, so we dont want to delete everything.

Symptoms:
The '/blog' is being appended to various URLs, causing invalid URLs such as link nascosto and link nascosto. Deactivating English without deleting orphans in the database did not resolve the issue.

Questions:
How can I stop '/blog' from being added to URLs in the future?
I would love to delete entirely the URLS created by this bug