I can`t translate a default plugin theme

Hello everyone,

A few days ago I installed a theme that came pre-installed with several plugins. This plugins need to be translated, but not all the words are in the mo file that you edit using Poedit software, so you have to translate them in the php code. The link of the site is https://www.alexandruvirbanescu.com/bitcar and the plugin is to search for the right, red colour, near to slider. All words have to be translated from there. What file should I edit?