We have a bi-lingual website with amp implemented for the mobile site. We are using amp-ad tag with type="doubleclick", the ads are rendering fine on english version of website where as for other language its showing empty slot.
Here is the code:
<amp-ad width="336" height="280" type="doubleclick"data-slot="/75242261/apherald-mobile-336x280">
<div placeholder></div>
</amp-ad>