fixes #3950 - added segment for language (code)

plugins/UserLanguage/Columns/Language.php

@@ -51,4 +51,14 @@ class Language extends VisitDimension
         $languageCode = Common::extractLanguageAndRegionCodeFromBrowserLanguage($acceptLanguagesString);
         return $languageCode;
     }
+
+    protected function configureSegments()
+    {
+        $segment = new \Piwik\Plugin\Segment();
+        $segment->setCategory('Visit Location');
+        $segment->setSegment('languageCode');
+        $segment->setName('General_Language');
+        $segment->setAcceptedValues('de, fr, en-gb, zh-cn, etc.');
+        $this->addSegment($segment);
+    }
 }

tests/PHPUnit/System/expected/test_apiGetReportMetadata__API.getSegmentsMetadata.xml

@@ -79,6 +79,13 @@
 		<segment>countryCode</segment>
 		<acceptedValues>de, us, fr, in, es, etc.</acceptedValues>
 	</row>
+	<row>
+		<type>dimension</type>
+		<category>Visit Location</category>
+		<name>Language</name>
+		<segment>languageCode</segment>
+		<acceptedValues>de, fr, en-gb, zh-cn, etc.</acceptedValues>
+	</row>
 	<row>
 		<type>dimension</type>
 		<category>Visit Location</category>