Incognito NCR by Andrey Leshenko

Tired of Google always switching to non-English language in Incognito (Private) mode?

When not browing in Incognito mode, this behavior can be disabled by browsing to https://google.com/ncr (which stands for No Country Redirect). However, in Incognito mode, the fix only lasts until you close the window.

This extension solves the problem of Incognito NCR automatically!

Each time you open a new Incognito window, the extension will automatically set the cookie responsible for the NCR setting. The cookie is received by making a request to the regular https://google.com/ncr page, and will be different in each Incognito session.

NOTE: Extension has to be manually allowed in Private mode after installation.

See the source code on GitHub for the full code and technical explanations.