diff --git a/html/do.php b/html/do.php
index b3d6a4039..e19f6f910 100644
--- a/html/do.php
+++ b/html/do.php
@@ -95,6 +95,7 @@ if ( DEBUGNOALYSS > 1 ) {
     \Noalyss\Dbg::display_size();
     \Noalyss\Dbg::display_request();
     \Noalyss\Dbg::display_global();
+    echo "encoding";echo mb_internal_encoding();
 } //<--- if DEBUG 
 $g_parameter=new Noalyss_Parameter_Folder($cn);
 
diff --git a/include/ajax/ajax_ledger.php b/include/ajax/ajax_ledger.php
index d5d042c7d..eba232337 100644
--- a/include/ajax/ajax_ledger.php
+++ b/include/ajax/ajax_ledger.php
@@ -564,7 +564,7 @@ switch ($action) {
         break;
     case 'note_refresh':
         $acc_operation_note= Acc_Operation_Note::build_jrn_id($jr_id);
-        echo substr($acc_operation_note->getNote()??"",0,120);
+        echo mb_substr($acc_operation_note->getNote()??"",0,120);
         
         return;
     case "rmsup":
diff --git a/include/class/acc_ledger_search.class.php b/include/class/acc_ledger_search.class.php
index 60ef7d600..cbda5d708 100644
--- a/include/class/acc_ledger_search.class.php
+++ b/include/class/acc_ledger_search.class.php
@@ -984,7 +984,7 @@ print $html;
             // Note
             $r.='<td>';
             $r.='<span id="als_note'.$row['jr_id'].'" class="font-small">';
-            $r.= substr($row['n_text']??"",0,120);
+            $r.= mb_substr($row['n_text']??"",0,120);
             $r.='<span>';
             $r.='</span>';
             $r.='</td>';
diff --git a/include/class/fiche.class.php b/include/class/fiche.class.php
index 8ea43a022..933481126 100644
--- a/include/class/fiche.class.php
+++ b/include/class/fiche.class.php
@@ -528,14 +528,14 @@ class Fiche
             if ( $p_array["av_text".ATTR_DEF_QUICKCODE] =="")
             {
                 if ( ! empty( $p_array['av_text'. ATTR_DEF_ACCOUNT])) {
-                    $base_acc=substr($p_array['av_text'. ATTR_DEF_ACCOUNT]??"",0, 3);
+                    $base_acc=mb_substr($p_array['av_text'. ATTR_DEF_ACCOUNT]??"",0, 3);
                 }else {
                     $base_acc=$this->cn->get_value("select substr(fd_class_base,1,2) from fiche_def where fd_id = $1",
                         [$p_fiche_def]);
                 }
                 $p_array["av_text".ATTR_DEF_QUICKCODE]=sprintf("%s%s"
                             , $base_acc
-                            , substr($p_array["av_text".ATTR_DEF_NAME], 0, 4)
+                            , mb_substr($p_array["av_text".ATTR_DEF_NAME], 0, 4)
                         );
             }
             $sql=sprintf("select insert_quick_code(%d,'%s')", $fiche_id,
diff --git a/include/template/operation_exercice-input_source.php b/include/template/operation_exercice-input_source.php
index 47bf3a288..38abbbcec 100644
--- a/include/template/operation_exercice-input_source.php
+++ b/include/template/operation_exercice-input_source.php
@@ -62,7 +62,7 @@ global $g_parameter;
                     $i = 0;
                     foreach ($avail as $r) {
                         $array[$i]['value'] = $r['dos_id'];
-                        $array[$i]['label'] = sprintf("%s %s (%s)",$r['dos_id'],$r['dos_name'],substr($r['dos_description']??"",0,50));
+                        $array[$i]['label'] = sprintf("%s %s (%s)",$r['dos_id'],$r['dos_name'],mb_substr($r['dos_description']??"",0,50));
                         $i++;
                     }
                     $sAvail = new ISelect('dos_id');