public function getLangFallbacks( $lang ) {
		if ( self::$fallbackCache === null ) {
			// Lazy-initialize
			self::$fallbackCache = $this->fetchLangFallbacks();
		}

		$lang = $this->normalizeLang( $lang );
		return isset( self::$fallbackCache[$lang] ) ? self::$fallbackCache[$lang] : [ 'en' ];
	}
public function getLangFallbacks( $lang ) {
		if ( self::$fallbackCache === null ) {
			// Lazy-initialize
			self::$fallbackCache = $this->fetchLangFallbacks();
		}

		$lang = $this->normalizeLang( $lang );
		return isset( self::$fallbackCache[$lang] ) ? self::$fallbackCache[$lang] : [ 'en' ];
	}
public function getLangFallbacks ( $ lang ) { if ( self :: $ fallbackCache === null ) { // Lazy-initialize self :: $ fallbackCache = $ this -> fetchLangFallbacks ( ) ; } $ lang = $ this -> normalizeLang ( $ lang ) ; return isset ( self :: $ fallbackCache [ $ lang ] ) ? self :: $ fallbackCache [ $ lang ] : [ 'en' ] ; }
Get fallback chain for a given language.

@param string $lang Language code
@return string[] List of one or more language codes
Get fallback chain for a given language .