@Scholz: That big logo will be responsive and will show small. So, no need to hide it. If you want to hide it then you can add the following css in “Appearance => theme Options => Custom CSS” box.
@media screen and (max-width: 768px) {
#header-left { display: none; }
#header-right { padding-top: 0; }
}
About the translation, you will see the catchkathmandu.pot file inside languages directory. Then you just need to create de_DE.po
and de_DE.mo
file. You can create with the help of poedit.net software. Once you compete the translation, you can send that files to use and we will add in the Theme update.