hreflang x-default
The fallback value in a set of language annotations that names the page to show when a visitor's language and country match none of the versions you published.
Analogy Mental model
A reception desk that sends the American guest to the American clerk and the German guest to the German clerk, and sends everyone else to the multilingual manager.
In practice What you actually do
Every annotated set needs one, usually pointing at your global English version or at a language-selection page. Without it, the matching logic has no defined answer for the countries you did not plan for, and it improvises.
Where people get burned Pitfalls
The audience you omit is rarely trivial: northern Europe, the Gulf, and southeast Asia contain large numbers of high-value English-reading buyers. Leaving them without a designated default means they land wherever the algorithm guesses.
This entry was written in English from the Chinese original, not machine-translated. Read the Chinese version →