Google includes uncrawlable pages in the index when they are linked from other sites.

That means that a link to the website like <a href="domain.com/en">[CHINESE] - Hey nighthawk</a> can show up in the search results.

Some have suggested that such occurrences are temporary. They aren't always. Google indexes uncrawlable pages because sometimes important pages are blocked by robots.txt. Matt Cutts explains why:

You might wonder why Google will sometimes return an uncrawled url reference, even if Googlebot was forbidden from crawling that url by a robots.txt file. There’s a pretty good reason for that: back when I started at Google in 2000, several useful websites (eBay, the New York Times, the California DMV) had robots.txt files that forbade any page fetches whatsoever. Now I ask you, what are we supposed to return as a search result when someone does the query [california dmv]? We’d look pretty sad if we didn’t return www.dmv.ca.gov as the first result. But remember: we weren’t allowed to fetch pages from www.dmv.ca.gov at that point. The solution was to show the uncrawled link when we had a high level of confidence that it was the correct link.

You are unlikely to see this page from your search result except for the site: query that you did. Otherwise somebody would have to search for [CHINESE] Hey nighthawk or some portion thereof.

Google includes uncrawlable pages in the index when they are linked from other sites.

That means that a link to the website like <a href="domain.com/en">[CHINESE] - Hey nighthawk</a> can show up in the search results.

Some have suggested that such occurrences are temporary. They aren't always. Google indexes uncrawlable pages because sometimes important pages are blocked by robots.txt. Matt Cutts explains:

You might wonder why Google will sometimes return an uncrawled url reference, even if Googlebot was forbidden from crawling that url by a robots.txt file. There’s a pretty good reason for that: back when I started at Google in 2000, several useful websites (eBay, the New York Times, the California DMV) had robots.txt files that forbade any page fetches whatsoever. Now I ask you, what are we supposed to return as a search result when someone does the query [california dmv]? We’d look pretty sad if we didn’t return www.dmv.ca.gov as the first result. But remember: we weren’t allowed to fetch pages from www.dmv.ca.gov at that point. The solution was to show the uncrawled link when we had a high level of confidence that it was the correct link.

You are unlikely to see this page from your search result except for the site: query that you did. Otherwise somebody would have to search for [CHINESE] Hey nighthawk or some portion thereof.