fix(sites): fix english mode doc (#784)

examples/sites/src/views/layout/layout.vue

@@ -50,7 +50,7 @@
 
           <div class="api-type">
             <div :class="{ 'api-mode': true, active: apiModeState.demoMode === 'single' }">
-              {{ $t2('单示例', 'Single Demo') }}
+              {{ $t2('单示例', 'Single') }}
             </div>
             <tiny-switch
               class="api-switch"
@@ -60,9 +60,9 @@
               v-model="apiModeState.demoMode"
             ></tiny-switch>
             <div :class="{ 'api-mode': true, active: apiModeState.demoMode === 'default' }">
-              {{ $t2('多示例', 'Mutli Demo') }}
+              {{ $t2('多示例', 'Multiple') }}
             </div>
-            <tiny-tooltip content="切换demo的预览模式" placement="right">
+            <tiny-tooltip :content="$t2('切换demo的预览模式', 'Change demo preview mode')" placement="right">
               <icon-help-circle></icon-help-circle>
             </tiny-tooltip>
           </div>