8 – Internal Node Pages are being crawled in Google?

I have created a basic page in Russian Language /ru/ and Russian is a default language. Since I did not translate page in English. but English internal node URLs are being crawled in Google SEO.

If I search the Russian page, then English internal node URLs(node/xxx) are also displaying in the google search.

Can anyone guide me how to restrict English Languages node internal URLs are not crawling in SEO?