As I said when I published the lingvo files... I knew they would be far from perfect!
I don't even speak German!
I need native language speakers such as yourself to help improve them.
You could even write your own lingvos by following the guidance in the Help document - if for example you a were Russian!
I shall add your translations to the next release.
Meanwhile any German speakers who want your translations now can simply download your zip file and replace the equivalent files with yours...
PS: Presumably there is
a word for 'Face' in German that you can apply to a 'Face' that forms a 'Surface' or 'Facet' in Sketchup ? That is the word we'd need...
know in French translations there is great debate about the correct word for Edge/Line as there are several alternatives too