Google SEO
July-November 2021 — Google Search Central Blog
What was the 2021 multilingual spam update?
A spam-detection system rolled out in several waves, extending coverage beyond English and reducing spam in search results worldwide.
Further analysis
Use this entry as an audit checkpoint. The cited source establishes the context; the direct answer identifies what to check before choosing an action.
In SFT, this topic relates to Trust. Check whether the signal is visible on the page, connected to the rest of the website and supported by understandable evidence.
Related search terms include spam update 2021, multilingual. Use them to describe the issue in a brief, audit or answer page.
Applying SFT
Trust requires observable evidence: sources, consistency, citations, identifiable authors and verifiable claims.