Remise en place des translate=true

etc/widget.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <widgets xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Widget:etc/widget.xsd">
-	<widget id="nicolasbejean_categorywidget" class="NicolasBejean\CategoryWidget\Block\Widget\CategoryWidget">
-		<label>widget_label</label>
-		<description>widget_description</description>
-		<parameters>
+    <widget id="nicolasbejean_categorywidget" class="NicolasBejean\CategoryWidget\Block\Widget\CategoryWidget">
+        <label translate="true">widget_label</label>
+        <description translate="true">widget_description</description>
+        <parameters>
             <parameter name="widget_title" xsi:type="text" visible="true" sort_order="1">
-                <label>widget_title</label>
+                <label translate="true">widget_title</label>
             </parameter>
             <parameter name="widget_content" xsi:type="text" visible="true" sort_order="2">
-                <label>widget_content</label>
+                <label translate="true">widget_content</label>
             </parameter>
-			<parameter name="category_selection" xsi:type="multiselect" visible="true" sort_order="3" source_model="NicolasBejean\CategoryWidget\Model\Config\Source\CategoryList">
-                <label>category_selection</label>
-                <description>category_selection_description</description>
+            <parameter name="category_selection" xsi:type="multiselect" visible="true" sort_order="3" source_model="NicolasBejean\CategoryWidget\Model\Config\Source\CategoryList">
+                <label translate="true">category_selection</label>
+                <description translate="true">category_selection_description</description>
             </parameter>
             <parameter name="category_image_width" xsi:type="text" visible="true" sort_order="4">
-                <label>category_image_width</label>
-                <description>category_image_width_description</description>
+                <label translate="true">category_image_width</label>
+                <description translate="true">category_image_width_description</description>
             </parameter>
             <parameter name="category_image_height" xsi:type="text" visible="true" sort_order="5">
-                <label>category_image_height</label>
-                <description>category_image_height_description</description>
+                <label translate="true">category_image_height</label>
+                <description translate="true">category_image_height_description</description>
             </parameter>
             <parameter name="template" xsi:type="select" required="true" visible="true" sort_order="6">
-                <label>template</label>
+                <label translate="true">template</label>
                 <options>
                     <option name="img_background" value="widget/category_widget_img_background.phtml" selected="true">
-                        <label>default_template</label>
+                        <label translate="true">default_template</label>
                     </option>
                     <option name="default" value="widget/category_widget.phtml">
-                        <label>other_template</label>
+                        <label translate="true">other_template</label>
                     </option>
                 </options>
             </parameter>
-		</parameters>
-	</widget>
+        </parameters>
+    </widget>
 </widgets>