Hi there I need to temporarily instruct Google to exclude from indexing all URLs that contain the following suffix:
How can I achieve this?
You can tell Googlebot how to handle your site's parameters in search console here: https://www.google.com/webmasters/tools/crawl-url-parameters?hl=en&siteUrl=
Simplly click "add parameter" and then add
lang=it. Select yes from the dropdown menu. From there you can tell Googlebot not to index pages with that parameter in your URL.