I currently use three of the Joomla51 Templates, (Metropolis, Oxygen, and Renovate), I have installed the extension MutiTransPro which is a site language translator. I have assigned to a position in the template breadcrumb and it works as expected on 2 templates (Metropolis and Oxygen) but in Renovate. It appears to be that the dropdown is being hiden behind the modulae positions.
I am using the latest release of Joomla.