diff --git a/packages/mindplot/src/components/Designer.ts b/packages/mindplot/src/components/Designer.ts
index 755c1eab..4fc23b8b 100644
--- a/packages/mindplot/src/components/Designer.ts
+++ b/packages/mindplot/src/components/Designer.ts
@@ -819,7 +819,7 @@ class Designer extends Events {
     const validateFunc = (topic: Topic) =>
       !(topic.getType() === 'CentralTopic' && shape === 'line');
 
-    const validateError = 'Central Topic shape can not be changed to line figure.';
+    const validateError = $msg('CENTRAL_TOPIC_STYLE_CAN_NOT_BE_CHANGED');
     const topicsIds = this.getModel().filterTopicsIds(validateFunc, validateError);
     if (topicsIds.length > 0) {
       this._actionDispatcher.changeShapeTypeToTopic(topicsIds, shape);
@@ -829,7 +829,7 @@ class Designer extends Events {
   changeConnectionStyle(type: LineType): void {
     const validateFunc = (topic: Topic) => !topic.isCentralTopic();
 
-    const validateError = 'Central topic connection style can not be changed for central topic.';
+    const validateError = $msg('CENTRAL_TOPIC_CONNECTION_STYLE_CAN_NOT_BE_CHANGED');
     const topicsIds = this.getModel().filterTopicsIds(validateFunc, validateError);
     if (topicsIds.length > 0) {
       this._actionDispatcher.changeConnectionStyleToTopic(topicsIds, type);
diff --git a/packages/mindplot/src/components/lang/de.js b/packages/mindplot/src/components/lang/de.js
index cca4df09..e01bcad4 100644
--- a/packages/mindplot/src/components/lang/de.js
+++ b/packages/mindplot/src/components/lang/de.js
@@ -19,6 +19,8 @@ const DE = {
   RELATIONSHIP_COULD_NOT_BE_CREATED: 'Die Beziehung konnte nicht angelegt werden. Es muss erst ein Vater-Thema ausgewählt werden, um die Beziehung herzustellen.',
   SELECTION_COPIED_TO_CLIPBOARD: 'Themen in der Zwischenablage',
   SESSION_EXPIRED: 'Deine Sitzung ist abgelaufen, bitte melde dich erneut an.',
+  CENTRAL_TOPIC_CONNECTION_STYLE_CAN_NOT_BE_CHANGED: 'Le style de connexion ne peut pas être modifié pour le sujet central.',
+  CENTRAL_TOPIC_STYLE_CAN_NOT_BE_CHANGED: 'Le sujet central ne peut pas être changé en style de ligne.',
 };
 
 export default DE;
diff --git a/packages/mindplot/src/components/lang/en.js b/packages/mindplot/src/components/lang/en.js
index 5bd47c47..d32a03d4 100644
--- a/packages/mindplot/src/components/lang/en.js
+++ b/packages/mindplot/src/components/lang/en.js
@@ -19,6 +19,8 @@ const EN = {
   RELATIONSHIP_COULD_NOT_BE_CREATED: 'Relationship could not be created. A parent relationship topic must be selected first.',
   SELECTION_COPIED_TO_CLIPBOARD: 'Topics copied to the clipboard',
   SESSION_EXPIRED: 'Your session has expired, please log-in again.',
+  CENTRAL_TOPIC_CONNECTION_STYLE_CAN_NOT_BE_CHANGED: 'Connection style can not be changed for central topic.',
+  CENTRAL_TOPIC_STYLE_CAN_NOT_BE_CHANGED: 'Central topic can not be changed to line style.',
 };
 
 export default EN;
diff --git a/packages/mindplot/src/components/lang/es.js b/packages/mindplot/src/components/lang/es.js
index d8d77ac2..5113b8e8 100644
--- a/packages/mindplot/src/components/lang/es.js
+++ b/packages/mindplot/src/components/lang/es.js
@@ -19,6 +19,8 @@ const ES = {
   RELATIONSHIP_COULD_NOT_BE_CREATED: 'La relación no pudo ser creada. Una relación padre debe ser seleccionada primero.',
   SELECTION_COPIED_TO_CLIPBOARD: 'Tópicos copiados al clipboard',
   SESSION_EXPIRED: 'Su session ha expirado. Por favor, ingrese nuevamente.',
+  CENTRAL_TOPIC_CONNECTION_STYLE_CAN_NOT_BE_CHANGED: 'El estilo de conexión no se puede cambiar para el tópico central.',
+  CENTRAL_TOPIC_STYLE_CAN_NOT_BE_CHANGED: 'Tópico central no se puede cambiar al estilo de línea.',
 };
 
 export default ES;
diff --git a/packages/mindplot/src/components/lang/fr.js b/packages/mindplot/src/components/lang/fr.js
index 85bd950a..d7381877 100644
--- a/packages/mindplot/src/components/lang/fr.js
+++ b/packages/mindplot/src/components/lang/fr.js
@@ -19,6 +19,9 @@ const FR = {
   RELATIONSHIP_COULD_NOT_BE_CREATED: 'Impossible de créer relation. Un noeud parent doit être sélectionné au préalable.',
   SELECTION_COPIED_TO_CLIPBOARD: 'Noeuds sélectionnés copiés dans le presse-papiers.',
   SESSION_EXPIRED: 'Votre session a expiré, veuillez vous reconnecter.',
+  CENTRAL_TOPIC_CONNECTION_STYLE_CAN_NOT_BE_CHANGED: 'Le style de connexion ne peut pas être modifié pour le sujet central.',
+  CENTRAL_TOPIC_STYLE_CAN_NOT_BE_CHANGED: 'Le sujet central ne peut pas être changé en style de ligne.',
+
 };
 
 export default FR;