Translation:Only one percent of Germans live in Czechia.
I think the translation "only one percent of germans live in czechia" is less clear than the czech original. The czech sentence wants to express, that one percent of the czech population are german, but the english sentence could be understood as one percent of the german population living in the czech republic.
Is the intent of the Czech sentence to say that one percent of those who live in the Czech Republic are German? Seems to me that it should mean that, because the alternative requires knowing the total number of Germans IN THE WORLD to determine that those who live In ČR actually amount to one percent of that figure...
I see. On the hand I see that they both denote the same country, on the other hand I feel that the equivalence is quite clearly Czechia=Česko and Czech Republic=Česká republika in the very same way as Germany=Německo and Spolková republika Německo=Federal Republic of Germany.
I gather there are some who prefer not to use Czechia for the country formerly known as the Czech Republic. I do not know how serious an issue this is politically. But the new usual name Czechia (English), Tchéquie (French), Tschechien (German) was announced a couple of years ago. Maps and so on have come into line. [see Washington Post article. also Le Monde « La République tchèque est morte, vive la Tchéquie ! »] Is it not just normal respect to be correct?
Well, the thing is, that BOTH versions are correct. Some use the longer, some use the shorter version. Not even the government and national sporting bodies are unified in their preferences for either version, so it would make a lot of sense to use both as equally valid in Duolingo too.
They are certainly both acknowledged here on Duolingo. The question is whether to accept this cross-translation of a long name translated by the short name and vice versa. That is something a larger group of people that manages the course must decide on. I am not sure it should be done.
This isn't a formal grammatical explanation, but I'll say this: With the verb following directly after a plural noun, it would sound very odd to use "lives." "Only one percent of Germans LIVES in Czechia" is strange. While it would be fine to say, for example, "X percent of Germany is forested land."