I can't see the complete 'en español' underneath the Spanish Stack Overflow logo on user profile pages. Nothing changes when I scroll, but when I go to the home page, the logo gets shifted up a bit and it looks fine. The same thing happens on the Russian Stack Overflow site.
You can tell that the logo is the correct image but shifted downwards because the top of the 'in [language]' text is visible:
I'm on Vivaldi 2.0 for Windows 10 and on Chrome 69.0.3497.100 for Windows 10. It happens only when you don't have an account for that site, both when you're anonymous and when you have connected accounts on other sites.