Good evening Mira and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
We are sorry to hear about the issue where not all of the views are displaying properly for you.
I would love to help you with this topic.
As you found out first hand, sometimes displaying in the proper language can be challenging.
The very first thing I would recommend is using the latest version of the po/mo files in Bulgarian: http://translations.theeventscalendar.com/projects
The reason I am mentioning this is because sometimes the language files packaged with the plugins themselves are not always 100% up to date (but the ones on Glotpress are).
Other than that, I am noticing that you are using 3 plugins for localization, it could be that one of them is interfering.
Could you also please go through our testing for conflicts procedure (preferably in a staging/dev environment or local install of your WordPress website) and let us know what you find out ?
Basically the goal here is to revert back to a bare WordPress installation to see if the problem persists. It also allows us to pinpoint what the cause of the issue is.
Let me know how that goes.
Best regards,
Geoff B.