--- a/server/src/app/Http/Controllers/Api/LexvoController.php	Sat Nov 19 21:29:56 2016 +0100
+++ b/server/src/app/Http/Controllers/Api/LexvoController.php	Tue Nov 22 13:53:52 2016 +0100
@@ -36,8 +36,9 @@
                 }
             }
             $lexvosNames = $this->lexvoResolver->getNames($ids);
-            $corpusNames = array_reduce($corpusIds, function($res,$cid) {
-                $cNode = CorpusFilterManager::getLanguageNode($cid);
+            $filterManager = new CorpusFilterManager();
+            $corpusNames = array_reduce($corpusIds, function($res,$cid) use ($filterManager) {
+                $cNode = $filterManager->getLanguageNode($cid);
                 if(is_null($cNode)) {
                     $res[$cid] = null;
                 } else {

--- a/server/src/app/Libraries/Filters/CorpusFilterManager.php	Sat Nov 19 21:29:56 2016 +0100
+++ b/server/src/app/Libraries/Filters/CorpusFilterManager.php	Tue Nov 22 13:53:52 2016 +0100
@@ -51,7 +51,7 @@
     }
 
     private function getLanguageNodeChildren($nodeId) {
-        $node = self::getLanguageNode($nodeId);
+        $node = $this->getLanguageNode($nodeId);
         if(is_null($node)) {
             return [];
         } elseif (array_key_exists('values', $node)) {
@@ -85,7 +85,7 @@
             else if(Utils::startsWith($lang, config('corpusparole.lexvo_base_url'))) {
                 array_push($resLanguage, $lang);
             } elseif(Utils::startsWith($lang, config('corpusparole.language_corpus_node_prefix'))) {
-                $resLanguage = array_merge($resLanguage, self::prepareLanguages(self::getLanguageNodeChildren($lang)));
+                $resLanguage = array_merge($resLanguage, $this->prepareLanguages($this->getLanguageNodeChildren($lang)));
             } else {
                 array_push($resLanguage, config('corpusparole.lexvo_base_url').$lang);
             }