Showing only relevant language results

Might be a misunderstanding of what the Custom Search i18n submodule does, but when searching, is there a way to show only results based on the current language of the user? In the Custom Search menu, under languages, I have it set to "Search Content from - Current Language". For each node there is both an English and translated German version. However when performing a search, I see both English and German results.

I did notice that when setting the content types to present for example, those settings have to be made by configuring that particular search block (structure/block/manage/custom_search_blocks/1) , verus the general (config/search/custom_search). But don't see the language tab on the block settings.