@language

The @language tag injects a foreign-language grammar — SQL, HTML, regular expressions, and the like — into a string literal, so PhpStorm can apply the right syntax highlighting and completion inside it.

Parsing a @language tag produces a LanguageTag instance, carrying the parsed $identifier alongside the $name and optional $description every Tag already provides.

Associated with PhpStorm; no dedicated JetBrains page documenting this exact doc-comment tag could be confirmed.