system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If Nipon is Japanese for Japan, and Deutschland is German for Germany, where do we get the words "Germany" and "Japan" from?
gpt
Germany comes from Latin. Germania is what the Romans called Germany. As a curiosity, the word "germanus", which means kin, evolved into Spanish's "hermano" (brother).

Japan comes from Mandarin - somewhat. (**EDIT**: There is debate in the comments. Read the comments!)  European traders heard what the Chinese said to refer to that country and kinda wrote it down as they heard it. Again as a curiosity, the old Spanish name for Japan is "Cipango" - here you can see the evolutionary origin of the word.