How to translate Select List options used in exposed filters of a view? I'm having an issue with translation of exposed filters in Views.

I'm using a text list field as an exposed filter in my view. The problem is that even though I translated the list terms via strings (Regional and Language >> translate interface >> translate) the terms always appear in the original language.

I checked but there is not an option in the view to show the translated terms in the filter. There are other exposed filters translated the same way that appear in the correct language, but they're not select lists but taxonomy terms.

I also checked the advanced views settings and the Localization translation method is already on "core". I don't know what else to check.

I'm using Better Exposed Filters and MEFIBS - More exposed forms in blocks for the exposed filters (I'm not sure if this may be related).
I can confirm this issue. While working with BEF, me too faced the same translation problem. Probably this is a bug in BEF module which do not handle translations properly. Meanwhile, to solve this issue I explicitly used a hook_form_views_exposed_form_alter() to wrap the non-translatable string in t(). 

May this helps you.