diff --git a/src/VueTreeList.vue b/src/VueTreeList.vue
index c1319c7..5d14a89 100644
--- a/src/VueTreeList.vue
+++ b/src/VueTreeList.vue
@@ -58,7 +58,7 @@
         />
         <div class="vtl-operation" v-show="isHover">
           <span
-            title="add tree node"
+            :title="defaultAddTreeNodeTitle"
             @click.stop.prevent="addChild(false)"
             v-if="!model.isLeaf && !model.addTreeNodeDisabled"
           >
@@ -67,7 +67,7 @@
             </slot>
           </span>
           <span
-            title="add leaf node"
+            :title="defaultAddLeafNodeTitle"
             @click.stop.prevent="addChild(true)"
             v-if="!model.isLeaf && !model.addLeafNodeDisabled"
           >
@@ -162,11 +162,19 @@ export default {
     },
     defaultLeafNodeName: {
       type: String,
-      default: 'New leaf node'
+      default: 'Leaf Node'
     },
     defaultTreeNodeName: {
       type: String,
-      default: 'New tree node'
+      default: 'Tree Node'
+    },
+    defaultAddTreeNodeTitle: {
+      type: String,
+      default: 'Add Tree Node'
+    },
+    defaultAddLeafNodeTitle: {
+      type: String,
+      default: 'Add Leaf Node'
     },
     defaultExpanded: {
       type: Boolean,
diff --git a/tests/unit/__snapshots__/render.spec.js.snap b/tests/unit/__snapshots__/render.spec.js.snap
index a8167fb..ad2b2e4 100644
--- a/tests/unit/__snapshots__/render.spec.js.snap
+++ b/tests/unit/__snapshots__/render.spec.js.snap
@@ -47,7 +47,7 @@ exports[`Render render correctly 1`] = `
           <div class="vtl-node-content">
             Node 2
           </div>
-          <div class="vtl-operation" style="display: none;"><span title="add tree node"><i class="vtl-icon vtl-icon-folder-plus-e"></i></span> <span title="add leaf node"><i class="vtl-icon vtl-icon-plus"></i></span> <span title="edit"><i class="vtl-icon vtl-icon-edit"></i></span> <span title="delete"><i class="vtl-icon vtl-icon-trash"></i></span></div>
+          <div class="vtl-operation" style="display: none;"><span title="Add Tree Node"><i class="vtl-icon vtl-icon-folder-plus-e"></i></span> <span title="Add Leaf Node"><i class="vtl-icon vtl-icon-plus"></i></span> <span title="edit"><i class="vtl-icon vtl-icon-edit"></i></span> <span title="delete"><i class="vtl-icon vtl-icon-trash"></i></span></div>
         </div>
         <!---->
       </div>
@@ -61,7 +61,7 @@ exports[`Render render correctly 1`] = `
           <div class="vtl-node-content">
             Node 3
           </div>
-          <div class="vtl-operation" style="display: none;"><span title="add tree node"><i class="vtl-icon vtl-icon-folder-plus-e"></i></span> <span title="add leaf node"><i class="vtl-icon vtl-icon-plus"></i></span> <span title="edit"><i class="vtl-icon vtl-icon-edit"></i></span> <span title="delete"><i class="vtl-icon vtl-icon-trash"></i></span></div>
+          <div class="vtl-operation" style="display: none;"><span title="Add Tree Node"><i class="vtl-icon vtl-icon-folder-plus-e"></i></span> <span title="Add Leaf Node"><i class="vtl-icon vtl-icon-plus"></i></span> <span title="edit"><i class="vtl-icon vtl-icon-edit"></i></span> <span title="delete"><i class="vtl-icon vtl-icon-trash"></i></span></div>
         </div>
         <!---->
       </div>
diff --git a/tests/unit/__snapshots__/slot.spec.js.snap b/tests/unit/__snapshots__/slot.spec.js.snap
index 784d2fc..ec2a6b9 100644
--- a/tests/unit/__snapshots__/slot.spec.js.snap
+++ b/tests/unit/__snapshots__/slot.spec.js.snap
@@ -11,7 +11,7 @@ exports[`Slot render slot correctly 1`] = `
           <div class="vtl-node-content">
             Node 1
           </div>
-          <div class="vtl-operation" style="display: none;"><span title="add tree node"><span class="add-tree-node-icon">📂</span></span> <span title="add leaf node"><span class="icon">＋</span></span> <span title="edit"><span class="icon">📃</span></span> <span title="delete"><span></span></span></div>
+          <div class="vtl-operation" style="display: none;"><span title="Add Tree Node"><span class="add-tree-node-icon">📂</span></span> <span title="Add Leaf Node"><span class="icon">＋</span></span> <span title="edit"><span class="icon">📃</span></span> <span title="delete"><span></span></span></div>
         </div>
         <div class="vtl-border vtl-bottom"></div>
       </div>
@@ -42,7 +42,7 @@ exports[`Slot render slot correctly 1`] = `
           <div class="vtl-node-content">
             Node 2
           </div>
-          <div class="vtl-operation" style="display: none;"><span title="add tree node"><span class="add-tree-node-icon">📂</span></span> <span title="add leaf node"><span class="icon">＋</span></span> <span title="edit"><span class="icon">📃</span></span> <span title="delete"><span class="del-node-icon">✂️</span></span></div>
+          <div class="vtl-operation" style="display: none;"><span title="Add Tree Node"><span class="add-tree-node-icon">📂</span></span> <span title="Add Leaf Node"><span class="icon">＋</span></span> <span title="edit"><span class="icon">📃</span></span> <span title="delete"><span class="del-node-icon">✂️</span></span></div>
         </div>
         <!---->
       </div>
diff --git a/tests/unit/operation.spec.js b/tests/unit/operation.spec.js
index 21533ff..ce576ac 100644
--- a/tests/unit/operation.spec.js
+++ b/tests/unit/operation.spec.js
@@ -51,7 +51,7 @@ describe('Operation', () => {
   })
 
   it('add leaf node', done => {
-    const $node1AddLeafNode = wrapper.find('#t1 [title="add leaf node"]')
+    const $node1AddLeafNode = wrapper.find('#t1 [title="Add Leaf Node"]')
     $node1AddLeafNode.trigger('click')
     Vue.nextTick(() => {
       expect(wrapper.findAll('.vtl-leaf-node').length).toBe(2)
@@ -60,7 +60,7 @@ describe('Operation', () => {
   })
 
   it('add tree node', done => {
-    const $node1AddTreeNode = wrapper.find('#t1 [title="add tree node"]')
+    const $node1AddTreeNode = wrapper.find('#t1 [title="Add Tree Node"]')
     $node1AddTreeNode.trigger('click')
     Vue.nextTick(() => {
       expect(wrapper.findAll('.vtl-tree-node').length).toBe(3)