1. Currently, the English, French, and Spanish Logo have two snakes and a blue flag, and the German logo has one snake, an orange flag and an orange background on the left upper corner. Soon, the flags will reflect the chosen language.

2. I first used this:

   .mllanguage1 .logo-image img {

   content:url("https://static1.squarespace.com/static/5cf3c7be3ec7de0001f2cb61/t/5d60e89a78d96e000180d340/1566632091387/Goldenes+Logo+Rechnung.png");

   }

Then this:

.mllanguage1 #headerWrapper #logo .logo-image img {

content:url("https://static1.squarespace.com/static/5cf3c7be3ec7de0001f2cb61/t/5d60e89a78d96e000180d340/1566632091387/Goldenes+Logo+Rechnung.png");

}

Both CSS have the same result: They work on smartphones but fail on other computers. In Microsoft Edge and Firefox, nothing happens. In Google Chrome, they works on smartphones but show no German logo at all on other computers.

Thanks for helping.