feature: support Spanish(#1196)

src/views/i18n-demo/index.vue

@@ -9,6 +9,7 @@
         <el-radio-group v-model="lang" size="small">
           <el-radio label="zh" border>简体中文</el-radio>
           <el-radio label="en" border>English</el-radio>
+          <el-radio label="es" border>Español</el-radio>
         </el-radio-group>
         <el-tag style="margin-top:15px;display:block;" type="info">{{ $t('i18nView.note') }}</el-tag>
       </div>
@@ -101,6 +102,7 @@ export default {
     if (!this.$i18n.getLocaleMessage('en')[viewName]) {
       this.$i18n.mergeLocaleMessage('en', local.en)
       this.$i18n.mergeLocaleMessage('zh', local.zh)
+      this.$i18n.mergeLocaleMessage('es', local.es)
     }
     this.setOptions() // set default select options
   },

src/views/i18n-demo/local.js

@@ -39,5 +39,25 @@ export default {
       two: 'Two',
       three: 'Three'
     }
+  },
+  es: {
+    i18nView: {
+      title: 'Switch Language',
+      note: 'The internationalization of this project is based on vue-i18n',
+      datePlaceholder: 'Pick a day',
+      selectPlaceholder: 'Select',
+      tableDate: 'tableDate',
+      tableName: 'tableName',
+      tableAddress: 'tableAddress',
+      default: 'default:',
+      primary: 'primary',
+      success: 'success',
+      info: 'info',
+      warning: 'warning',
+      danger: 'danger',
+      one: 'One',
+      two: 'Two',
+      three: 'Three'
+    }
   }
 }