diff --git a/htdocs/core/tpl/admin_extrafields_add.tpl.php b/htdocs/core/tpl/admin_extrafields_add.tpl.php
index 97eb229fd60..47ca36254b5 100644
--- a/htdocs/core/tpl/admin_extrafields_add.tpl.php
+++ b/htdocs/core/tpl/admin_extrafields_add.tpl.php
@@ -201,7 +201,7 @@ print $formadmin->selectTypeOfFields('type', GETPOST('type', 'alpha'));
 <td>
 	<table class="nobordernopadding">
 	<tr><td>
-		<textarea name="param" id="param" cols="80" rows="<?php echo ROWS_4 ?>"><?php echo GETPOST('param', 'alpha'); ?></textarea>
+		<textarea name="param" id="param" cols="80" rows="<?php echo ROWS_4 ?>" spellcheck="false""><?php echo GETPOST('param', 'alpha'); ?></textarea>
 	</td><td>
 	<span id="helpselect" class="spanforparamtooltip"><?php print $form->textwithpicto('', $langs->trans("ExtrafieldParamHelpselect"), 1, 'info', '', 0, 2, 'helpvalue1')?></span>
 	<span id="helpsellist" class="spanforparamtooltip"><?php print $form->textwithpicto('', $langs->trans("ExtrafieldParamHelpsellist").'<br>'.$langs->trans("ExtrafieldParamHelpsellistb").'<br>'.$langs->trans("ExtrafieldParamHelpsellistc").'<br>'.$langs->trans("ExtrafieldParamHelpsellistd").(getDolGlobalInt('MAIN_FEATUREES_LEVEL') > 0 ? '<br>'.$langs->trans("ExtrafieldParamHelpsellist2") : ''), 1, 'info', '', 0, 2, 'helpvalue2')?></span>
diff --git a/htdocs/core/tpl/admin_extrafields_edit.tpl.php b/htdocs/core/tpl/admin_extrafields_edit.tpl.php
index 88049c436a7..f29d14b0bfb 100644
--- a/htdocs/core/tpl/admin_extrafields_edit.tpl.php
+++ b/htdocs/core/tpl/admin_extrafields_edit.tpl.php
@@ -263,7 +263,7 @@ if (in_array($type, array_keys($typewecanchangeinto))) {
 <td>
 	<table class="nobordernopadding">
 	<tr><td>
-		<textarea name="param" id="param" cols="80" rows="<?php echo ROWS_4 ?>"><?php echo dol_htmlcleanlastbr($param_chain); ?></textarea>
+		<textarea name="param" id="param" cols="80" rows="<?php echo ROWS_4 ?>" spellcheck="false"><?php echo dol_htmlcleanlastbr($param_chain); ?></textarea>
 	</td><td>
 	<span id="helpselect" class="spanforparamtooltip"><?php print $form->textwithpicto('', $langs->trans("ExtrafieldParamHelpselect"), 1, 'info', '', 0, 2, 'helpvalue1')?></span>
 	<span id="helpsellist" class="spanforparamtooltip"><?php print $form->textwithpicto('', $langs->trans("ExtrafieldParamHelpsellist").'<br>'.$langs->trans("ExtrafieldParamHelpsellistb").'<br>'.$langs->trans("ExtrafieldParamHelpsellistc").'<br>'.$langs->trans("ExtrafieldParamHelpsellistd").(getDolGlobalInt('MAIN_FEATUREES_LEVEL') > 0 ? '<br>'.$langs->trans("ExtrafieldParamHelpsellist2") : ''), 1, 'info', '', 0, 2, 'helpvalue2')?></span>