Sudden Drop in Visibility After Multilingual Launch – No Manual Action

[Joey]

Hi everyone,

I'm experiencing a critical visibility issue after implementing multilingual support on my website and would appreciate your insights. Here's the detailed timeline and troubleshooting steps I've taken:

Issue Description:

August 13 (Wednesday):
Launched multilingual subdirectory structure (e.g., example.com/es/, example.com/fr/)

August 15 (Friday) 00:00 onward:
GSC shows impressions/clicks dropped drastically (~90% decline)
Branded searches no longer return our site (even for exact match "BrandName")
Organic rankings nearly disappeared across all keywords

Troubleshooting Completed:

Google Search Console:
No manual actions or security issues
Coverage report shows all language versions indexed properly

Technical Checks:
Confirmed no accidental noindex tags
robots.txt not blocking any pages
Proper canonical tags in place

Multilingual Implementation:
hreflang annotations implemented
Each language version has unique content

Backlink Profile:
New website with minimal backlinks
Potential Issues Under Investigation

Request for Community Help:
Has anyone experienced similar drops after multilingual implementation?
What tools beyond GSC would help diagnose this site-wide ranking loss?
Any suggestions for recovering?

[tangor]

@Joey ... Welcome to Webmasterworld!

Short answer: Nobody knows...

Longer answer: Major change to the site (one language to multi). This will certainly cause a pause as g re-evaluates. This is more significant than say, changing layouts, UI, or CWV.

Unwanted answer: GIVE IT TIME. Fast as the web might be, g ain't that fast when faced with CHANGE. By time, think 6 weeks to 6 months. At present there's not enough data to make any observations.

[not2easy]

Hi Joey and welcome to WebmasterWorld [webmasterworld.com]

It is a readjustment period when such large, sitewide changes are made. It isn't a ranking loss so much as a reassessment while the changes are evaluated.

You can check your site's coding (html/css) with free w3 tools: https://validator.w3.org/ and https://jigsaw.w3.org/css-validator/

If you had submitted a sitemap, you should update that info. Google offers tools to check your language implementation here: https://developers.google.com/search/docs/specialty/international/localized-versions

If you have content that has been AI generated, it should be human verified/edited for accuracy. Your current situation will change, until they're finished with their evaluations, it may seem worse than it is, it takes far more than a week to digest your changes.

Good luck with it.

[Brett_Tabke]

any hreflang & Canonical Conflicts?

The branded search disappearance is the most concerning. That can point to a couple things 1) index page confusion (g doesn't know which one is which) or 2) algo trust issue - eeat issues that look like a soft penalty (back in the sandbox)