Add HTML lang tags where possible (#199)

core/src/main/resources/google/registry/ui/soy/Console.soy

@@ -69,7 +69,7 @@
   {@param logoutUrl: string}
   {@param logoFilename: string}
   {@param productName: string}
-  <div id="kd-googlebar" role="banner">
+  <div id="kd-googlebar" role="banner" lang="en-US">
     <a class="{css('logo')}" href="/registrar">
       <img src="/assets/images/{$logoFilename}" alt="{$productName}">
     </a>

core/src/main/resources/google/registry/ui/soy/registrar/Console.soy

@@ -43,7 +43,7 @@
     {param analyticsConfig: $analyticsConfig /}
   {/call}
   {call registry.soy.console.googlebar data="all" /}
-  <div id="reg-app">
+  <div id="reg-app" lang="en-US">
     <div id="reg-appbar" class="{css('kd-appbar')}">
       <div class="{css('kd-description')}">
         Accessing <span class="{css('kd-value')}">{$clientId}</span> as{sp}