Index: gc_core/js/lang_core/gc_engine.js
==================================================================
--- gc_core/js/lang_core/gc_engine.js
+++ gc_core/js/lang_core/gc_engine.js
@@ -465,11 +465,11 @@
         return [];
     }
     if (!_dAnalyses.has(sWord) && !_storeMorphFromFSA(sWord)) {
         return [];
     }
-    return [ for (s of _dAnalyses.get(sWord))  s.slice(1, s.indexOf(" ")) ];
+    return _dAnalyses.get(sWord).map( s => s.slice(1, s.indexOf(" ")) );
 }
 
 
 //// functions to get text outside pattern scope
 
@@ -569,11 +569,11 @@
     }
     //echo("morph: "+_dAnalyses.get(sWord).toString());
     if (_dAnalyses.get(sWord).length === 1) {
         return true;
     }
-    let lSelect = [ for (sMorph of _dAnalyses.get(sWord))  if (sMorph.search(sPattern) !== -1)  sMorph ];
+    let lSelect = _dAnalyses.get(sWord).filter( sMorph => sMorph.search(sPattern) === -1 );
     //echo("lSelect: "+lSelect.toString());
     if (lSelect.length > 0) {
         if (lSelect.length != _dAnalyses.get(sWord).length) {
             dDA.set(nPos, lSelect);
         }
@@ -594,11 +594,11 @@
         return true;
     }
     if (_dAnalyses.get(sWord).length === 1) {
         return true;
     }
-    let lSelect = [ for (sMorph of _dAnalyses.get(sWord))  if (sMorph.search(sPattern) === -1)  sMorph ];
+    let lSelect = _dAnalyses.get(sWord).filter( sMorph => sMorph.search(sPattern) === -1 );
     //echo("lSelect: "+lSelect.toString());
     if (lSelect.length > 0) {
         if (lSelect.length != _dAnalyses.get(sWord).length) {
             dDA.set(nPos, lSelect);
         }

Index: gc_lang/fr/modules-js/gce_suggestions.js
==================================================================
--- gc_lang/fr/modules-js/gce_suggestions.js
+++ gc_lang/fr/modules-js/gce_suggestions.js
@@ -142,11 +142,11 @@
     return "";
 }
 
 function suggVerbInfi (sFlex) {
     //return stem(sFlex).join("|");
-    return [ for (sStem of stem(sFlex)) if (conj.isVerb(sStem)) sStem ].join("|");
+    return [ stem(sFlex).filter(sStem => conj.isVerb(sStem)) ].join("|");
 }
 
 
 const _dQuiEst = new Map ([
     ["je", ":1s"], ["j’", ":1s"], ["j’en", ":1s"], ["j’y", ":1s"],

Index: gc_lang/fr/modules-js/lexicographe.js
==================================================================
--- gc_lang/fr/modules-js/lexicographe.js
+++ gc_lang/fr/modules-js/lexicographe.js
@@ -224,17 +224,23 @@
                     if (oToken.sValue.gl_count("-") > 4) {
                         return { sType: "COMPLEX", sValue: oToken.sValue, aLabel: ["élément complexe indéterminé"] };
                     }
                     else if (this.oDict.isValidToken(oToken.sValue)) {
                         let lMorph = this.oDict.getMorph(oToken.sValue);
-                        let aElem = [ for (s of lMorph) if (s.includes(":")) this._formatTags(s) ];
+                        let aElem = [];
+                        for (let s of lMorph){
+                            if (s.includes(":"))  aElem.push( this._formatTags(s) );
+                        }
                         return { sType: oToken.sType, sValue: oToken.sValue, aLabel: aElem};
                     }
                     else if (m = this._zCompoundWord.exec(oToken.sValue)) {
                         // mots composés
                         let lMorph = this.oDict.getMorph(m[1]);
-                        let aElem = [ for (s of lMorph) if (s.includes(":")) this._formatTags(s) ];
+                        let aElem = [];
+                        for (let s of lMorph){
+                            if (s.includes(":"))  aElem.push( this._formatTags(s) );
+                        }
                         aElem.push("-" + m[2] + ": " + this._formatSuffix(m[2].toLowerCase()));
                         return { sType: oToken.sType, sValue: oToken.sValue, aLabel: aElem };
                     }
                     else {
                         return { sType: "UNKNOWN", sValue: oToken.sValue, aLabel: ["inconnu du dictionnaire"] };

Index: gc_lang/fr/modules-js/mfsp.js
==================================================================
--- gc_lang/fr/modules-js/mfsp.js
+++ gc_lang/fr/modules-js/mfsp.js
@@ -36,11 +36,15 @@
     },
 
     getMasForm: function (sWord, bPlur) {
         // returns masculine form with feminine form
         if (this._dMasForm.has(sWord)) {
-            return [ for (sTag of this._whatSuffixCode(sWord, bPlur))  this._modifyStringWithSuffixCode(sWord, sTag) ];
+            let masForm = [];
+            for (var sTag of this._whatSuffixCode(sWord, bPlur)){
+                masForm.push( this._modifyStringWithSuffixCode(sWord, sTag) );
+            }
+            return masForm;
         }
         return [];
     },
 
     hasMiscPlural: function (sWord) {
@@ -49,11 +53,15 @@
     },
 
     getMiscPlural: function (sWord) {
         // returns plural form with singular form
         if (this._dMiscPlur.has(sWord)) {
-            return [ for (sTag of this._lTagMiscPlur[this._dMiscPlur.get(sWord)].split("|"))  this._modifyStringWithSuffixCode(sWord, sTag) ];
+            let miscPlurial = [];
+            for (var sTag of this._lTagMiscPlur[this._dMiscPlur.get(sWord)].split("|")){
+                miscPlurial.push( this._modifyStringWithSuffixCode(sWord, sTag) );
+            }
+            return miscPlurial;
         }
         return [];
     },
 
     _whatSuffixCode: function (sWord, bPlur) {