TheTVDB scraper : Default behaviour when retrieving artwork for non-english TV series

I have a few non-english series that will not pull through artwork from the TVDB unless a poster/banner/fanart is tagged as English

Is this default behaviour ?

I'm running OSMC ( Kodi 17.6 2018.06-1 )

My TVDB scraper settings are :

language                                                            En
use a fallback language for search and details        ticked
fallback language                                                En

thanks
bob