diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index a6cce4e7bfb..16ab5f8f1b9 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -9044,7 +9044,7 @@ class Form
 	 */
 	public static function selectArrayAjax($htmlname, $url, $id = '', $moreparam = '', $moreparamtourl = '', $disabled = 0, $minimumInputLength = 1, $morecss = '', $callurlonselect = 0, $placeholder = '', $acceptdelayedhtml = 0)
 	{
-		global $conf, $langs;
+		global $conf;
 		global $delayedhtmlcontent;    // Will be used later outside of this function
 
 		// TODO Use an internal dolibarr component instead of select2
@@ -9091,9 +9091,9 @@ class Form
 				    		},
 				    		cache: true
 				    	},
-		 				language: select2arrayoflanguage,
+		 				language: select2arrayoflanguage || \'en\',
 						containerCssClass: \':all:\',					/* Line to add class from the original SELECT propagated to the new <span class="select2-selection...> tag */
-					    placeholder: "' . dol_escape_js($placeholder) . '",
+					    placeholder: \'' . dol_escape_js($placeholder) . '\',
 				    	escapeMarkup: function (markup) { return markup; }, 	// let our custom formatter work
 				    	minimumInputLength: ' . ((int) $minimumInputLength) . ',
 				        formatResult: function (result, container, query, escapeMarkup) {
@@ -9104,9 +9104,9 @@ class Form
 	                ' . ($callurlonselect ? '
 	                /* Code to execute a GET when we select a value */
 	                $(".' . $htmlname . '").change(function() {
-				    	var selected = $(".' . $htmlname . '").val();
+				    	var selected = $(\'.' . dol_escape_js($htmlname) . '\').val();
 	                	console.log("We select in selectArrayAjax the entry "+selected)
-				        $(".' . $htmlname . '").val("");  /* reset visible combo value */
+				        $(\'.' . dol_escape_js($htmlname) . '\').val("");  /* reset visible combo value */
 	    			    $.each( saveRemoteData, function( key, value ) {
 	    				        if (key == selected)
 	    			            {
@@ -9149,7 +9149,7 @@ class Form
 	 */
 	public static function selectArrayFilter($htmlname, $array, $id = '', $moreparam = '', $disableFiltering = 0, $disabled = 0, $minimumInputLength = 1, $morecss = '', $callurlonselect = 0, $placeholder = '', $acceptdelayedhtml = 0, $textfortitle = '')
 	{
-		global $conf, $langs;
+		global $conf;
 		global $delayedhtmlcontent;    // Will be used later outside of this function
 
 		// TODO Use an internal dolibarr component instead of select2
@@ -9179,13 +9179,13 @@ class Form
 
 					' . ($callurlonselect ? 'var saveRemoteData = ' . json_encode($array) . ';' : '') . '
 
-					$(".' . $htmlname . '").select2({
+					$(\'.' . dol_escape_js($htmlname) . '\').select2({
 						data: data,
-						language: select2arrayoflanguage,
+						language: select2arrayoflanguage || \'en\',
 						containerCssClass: \':all:\',					/* Line to add class from the original SELECT propagated to the new <span class="select2-selection...> tag */
-						placeholder: "' . dol_escape_js($placeholder) . '",
+						placeholder: \'' . dol_escape_js($placeholder) . '\',
 						escapeMarkup: function (markup) { return markup; }, 	// let our custom formatter work
-						minimumInputLength: ' . $minimumInputLength . ',
+						minimumInputLength: ' . ((int) $minimumInputLength) . ',
 						formatResult: function (result, container, query, escapeMarkup) {
 							return escapeMarkup(result.text);
 						},
@@ -9224,11 +9224,11 @@ class Form
 
 					' . ($callurlonselect ? '
 					/* Code to execute a GET when we select a value */
-					$(".' . $htmlname . '").change(function() {
-						var selected = $(".' . $htmlname . '").val();
+					$(\'.' . dol_escape_js($htmlname) . '\').change(function() {
+						var selected = $(\'.' . dol_escape_js($htmlname) . '\').val();
 						console.log("We select "+selected)
 
-						$(".' . $htmlname . '").val("");  /* reset visible combo value */
+						$(\'.' . dol_escape_js($htmlname) . '\').val("");  /* reset visible combo value */
 						$.each( saveRemoteData, function( key, value ) {
 							if (key == selected)
 							{
@@ -9357,7 +9357,7 @@ class Form
 				}
 				$out .= '}' . "\n";
 				$out .= '$(document).ready(function () {
-							$(\'#' . $htmlname . '\').' . $tmpplugin . '({';
+							$(\'#' . dol_escape_js($htmlname) . '\').' . $tmpplugin . '({';
 				if ($placeholder) {
 					$out .= '
 								placeholder: {
@@ -9367,7 +9367,7 @@ class Form
 				}
 				$out .= '		dir: \'ltr\',
 								containerCssClass: \':all:\',					/* Line to add class of origin SELECT propagated to the new <span class="select2-selection...> tag (ko with multiselect) */
-								dropdownCssClass: \'' . $morecss . '\',				/* Line to add class on the new <span class="select2-selection...> tag (ok with multiselect). Need full version of select2. */
+								dropdownCssClass: \'' . dol_escape_js($morecss) . '\',				/* Line to add class on the new <span class="select2-selection...> tag (ok with multiselect). Need full version of select2. */
 								// Specify format function for dropdown item
 								formatResult: formatResult,
 							 	templateResult: formatResult,		/* For 4.0 */
@@ -9375,26 +9375,26 @@ class Form
 								// Specify format function for selected item
 								formatSelection: formatSelection,
 							 	templateSelection: formatSelection,		/* For 4.0 */
-							 	language: select2arrayoflanguage
+							 	language: select2arrayoflanguage || \'en\'
 							});
 
 							/* Add also morecss to the css .select2 that is after the #htmlname, for component that are show dynamically after load, because select2 set
 								 the size only if component is not hidden by default on load */
-							$(\'#' . $htmlname . ' + .select2\').addClass(\'' . $morecss . '\');
+							$(\'#' . dol_escape_js($htmlname) . ' + .select2\').addClass(\'' . dol_escape_js($morecss) . '\');
 						});' . "\n";
 			} elseif ($addjscombo == 2 && !defined('DISABLE_MULTISELECT')) {
 				// Add other js lib
 				// TODO external lib multiselect/jquery.multi-select.js must have been loaded to use this multiselect plugin
 				// ...
-				$out .= 'console.log(\'addjscombo=2 for htmlname=' . $htmlname . '\');';
+				$out .= 'console.log(\'addjscombo=2 for htmlname=' . dol_escape_js($htmlname) . '\');';
 				$out .= '$(document).ready(function () {
-							$(\'#' . $htmlname . '\').multiSelect({
+							$(\'#' . dol_escape_js($htmlname) . '\').multiSelect({
 								containerHTML: \'<div class="multi-select-container">\',
 								menuHTML: \'<div class="multi-select-menu">\',
-								buttonHTML: \'<span class="multi-select-button ' . $morecss . '">\',
+								buttonHTML: \'<span class="multi-select-button ' . dol_escape_js($morecss) . '">\',
 								menuItemHTML: \'<label class="multi-select-menuitem">\',
 								activeClass: \'multi-select-container--open\',
-								noneText: \'' . $placeholder . '\'
+								noneText: \'' . dol_escape_js($placeholder) . '\'
 							});
 						})';
 			}