Steps to reproduce:

Go on the German version of the Minecraft: Java Edition purchase site. Pick PC as your platform. Choose any PC platform. (Tested on Chrome 91 running on Android 11)

Direct link: https://www.minecraft.net/de-de/store/minecraft-java-edition

Now look at the price tag, instead of Euro (€) you will see some faulty characters that are probably due to non-utf-8 encoding/bad encoding (see the attached image file)

The menu button at the top right doesn't work too.