I'm Spanish myself, I worked there for 10 years, and I never understood that mindset. Every place where I worked I would leave as soon as my working day ended. I'm now working in Japan, a country famous for inventing the word "karoshi" (death from overwork), I'm I do the same.

The only place where I would leave late was when I was working as a research assistant at my university, because my boss was super nice, the environment was friendly, my job was really interesting, and I was happy.