Added link to language analyzers

Closes elastic#257

052_Mapping_Analysis/40_Analysis.asciidoc

@@ -71,7 +71,7 @@ lowercase. It would produce
 
 Language analyzers::
 
-Language-specific analyzers ((("language analyzers")))are available for many languages. They are able to
+Language-specific analyzers ((("language analyzers")))are available for http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-lang-analyzer.html[many languages]. They are able to
 take the peculiarities of the specified language into account. For instance,
 the `english` analyzer comes with a set of English ((("stopwords")))stopwords (common words
 like `and` or `the` that don't have much impact on relevance), which it