Update welcome.html.j2

roles/custom/matrix-client-element/templates/welcome.html.j2

@@ -178,11 +178,11 @@ we don't have an account and should hide them. No account == no guest account ei
     <div class="mx_ButtonGroup">
         <div class="mx_ButtonRow">
             <a href="#/login" class="mx_ButtonParent mx_ButtonSignIn mx_Button_iconSignIn">
-                <div class="mx_ButtonLabel">_t("Sign In")</div>
+                <div class="mx_ButtonLabel">_t("action|sign_in")</div>
             </a>
 {% if matrix_client_element_registration_enabled %}
             <a href="#/register" class="mx_ButtonParent mx_ButtonCreateAccount mx_Button_iconCreateAccount">
-                <div class="mx_ButtonLabel">_t("Create Account")</div>
+                <div class="mx_ButtonLabel">_t("action|create_account")</div>
             </a>
 {% endif %}
         </div>
@@ -195,7 +195,7 @@ we don't have an account and should hide them. No account == no guest account ei
         <div class="mx_ButtonRow mx_WelcomePage_guestFunctions">
             <div>
                 <a href="#/directory" class="mx_ButtonParent mx_SecondaryButton mx_Button_iconRoomDirectory">
-                    <div class="mx_ButtonLabel">_t("Explore rooms")</div>
+                    <div class="mx_ButtonLabel">_t("action|explore_rooms")</div>
                 </a>
             </div>
         </div>