I've tried several widgets for recent posts for example this one - Recent Posts Thumbnail Slider Widget and also others that are sliders and are inserted in the widget area.
When I insert it in the widget then it won't work and no posts are present. I presume they are filtered by the polylang extension as as soon as I deactivate it it works fine.
Also when I insert raw functions or custom code with polylang activated it filters the recent posts.
Can someone help out?