diff --git a/system/lang/en-en.json b/system/lang/en-en.json
index 8a7313a..ebeddae 100644
--- a/system/lang/en-en.json
+++ b/system/lang/en-en.json
@@ -20,6 +20,7 @@
     "spe.chat.pref": "If specified, this string will be prefixed to all chat messages that are not already commands (such as /emote.)",
     "l5r5e": {
         "global": {
+            "ok": "OK",
             "add": "Add",
             "edit": "Edit",
             "delete": "Delete",
@@ -120,6 +121,7 @@
         "techniques": {
             "title": "Techniques",
             "title_new": "New Technique",
+            "not_allowed": "Your character does not use this type of technique.",
             "type": "Type accessible",
             "kata": "Kata",
             "kiho": "Kihõ",
diff --git a/system/lang/es-es.json b/system/lang/es-es.json
index f967dc5..037ddda 100644
--- a/system/lang/es-es.json
+++ b/system/lang/es-es.json
@@ -20,6 +20,7 @@
     "spe.chat.pref": "Si está configurado, la cadena será prefijada para todos los mensajes de chat que no sean ya comandos (como /emote.)",
     "l5r5e": {
         "global": {
+            "ok": "OK",
             "add": "Add",
             "edit": "Edit",
             "delete": "Delete",
@@ -120,6 +121,7 @@
         "techniques": {
             "title": "Techniques",
             "type": "Tipo accesible",
+            "not_allowed": "Your character does not use this type of technique.",
             "title_new": "Nuevo Rasgo",
             "kata": "Kata",
             "kiho": "Kihõ",
diff --git a/system/lang/fr-fr.json b/system/lang/fr-fr.json
index 2083587..948ee1a 100644
--- a/system/lang/fr-fr.json
+++ b/system/lang/fr-fr.json
@@ -20,6 +20,7 @@
     "spe.chat.pref": "Si renseignée, la chaîne sera préfixée pour tous les messages de chat qui ne sont pas déjà des commandes (comme /emote.)",
     "l5r5e": {
         "global": {
+            "ok": "OK",
             "add": "Ajouter",
             "edit": "Modifier",
             "delete": "Supprimer",
@@ -120,6 +121,7 @@
         "techniques": {
             "title": "Techniques",
             "title_new": "Nouvelle Technique",
+            "not_allowed": "Votre personnage n'utilise pas ce type de technique.",
             "type": "Type accessible",
             "kata": "Kata",
             "kiho": "Kihõ",
diff --git a/system/scripts/actors/base-sheet.js b/system/scripts/actors/base-sheet.js
index 0cf353b..608a598 100644
--- a/system/scripts/actors/base-sheet.js
+++ b/system/scripts/actors/base-sheet.js
@@ -49,11 +49,19 @@ export class BaseSheetL5r5e extends ActorSheet {
             return Promise.resolve();
         }
 
-        // Check if technique is allowed
-        if (item.data.type === "technique") {
-            // TODO Verifier que la technique est possible pour ce persos ? technique_type / techniques.kata
-            //console.log(item.data.data.technique_type, this.actor.data.data.techniques);
-            //return Promise.resolve();
+        // Check if technique is allowed for this character
+        if (item.data.type === "technique" && !this.actor.data.data.techniques[item.data.data.technique_type]) {
+            new Dialog({
+                title: "Nope !",
+                content: game.i18n.localize("l5r5e.techniques.not_allowed"),
+                buttons: {
+                    ok: {
+                        label: game.i18n.localize("l5r5e.global.ok"),
+                        icon: '<i class="fas fa-check"></i>',
+                    },
+                },
+            }).render(true);
+            return Promise.resolve();
         }
 
         // Ok add item