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diff --git a/plugins/uml/properties/org.eclipse.papyrus.uml.properties/src/org/eclipse/papyrus/uml/properties/widgets/LanguageBodyEditor.java b/plugins/uml/properties/org.eclipse.papyrus.uml.properties/src/org/eclipse/papyrus/uml/properties/widgets/LanguageBodyEditor.java
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+++ b/plugins/uml/properties/org.eclipse.papyrus.uml.properties/src/org/eclipse/papyrus/uml/properties/widgets/LanguageBodyEditor.java
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+/*****************************************************************************
+ * Copyright (c) 2018 CEA LIST and others.
+ * 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Vincent Lorenzo (CEA LIST) - vincent.lorenzo@cea.fr - Initial API and implementation
+ *   
+ *****************************************************************************/
+
+package org.eclipse.papyrus.uml.properties.widgets;
+
+/**
+ * This class allows to manage the change of the language to use in a body editor.
+ * This interface has been created to fix the Bug 536594: [Properties][OpaqueExpression][XText] the change of the language to use doesn't work propertly with Xtext editor
+ * 
+ * @author Vincent LORENZO
+ * @since 3.2
+ */
+public interface LanguageBodyEditor extends BodyEditor {
+
+	/**
+	 * 
+	 * @param language
+	 *            the language associated to the editor, it can't be <code>null</code>
+	 */
+	public default void setLanguage(final String language) { // default to ensure implementation and avoid API break
+		// do nothing
+	}
+
+	/**
+	 * 
+	 * @return
+	 * 		the language associated to the editor, it can be an empty string if the language is not yet defined
+	 *         it can't return <code>null</code>
+	 */
+	public default String getLanguage() {
+		return ""; //$NON-NLS-1$ //to ensure implementation and avoid API break
+	}
+}