Earlier quoted context omitted.
This scene is a particular pet peeve of mine (I know it's a movie, but everyone needs something to be picky about...). The character played by Fassbender at one point explains his peculiar accent by being born and raised in a village near Piz Palü (an hommage by Tarantino to "White Hell of Piz Palü" a 1929 silent movie). However, this mountain is located in Switzerland, right by the italian border, far away from Germ…
You could be born in Switzerland to German parents, thus being German (with a funny accent to boot). Germany (at the time) employed jus sanguinis (=your parents matter), not jus soli (=your place of birth matters). https://en.wikipedia.org/wiki/Jus_sanguinis https://en.wikipedia.org/wiki/Jus_soli
In the context of the special interest that the film devotes to the subject of language, locating the birthplace of the character near Piz Palü is also a very clever move. It is located in the canton of Graubünden (canton of the Grisons), which is the only trilingual Swiss canton (German, Italian and Romansh).
Another side-note: "White Hell of Piz Palü" is also directly quoted in the film: it is shown in the cinema where the finale takes place. And this again is an hommage to (among others) Leni Riefenstahl, who Tarantino admired very much. She played one of the main roles in "Piz Palü".
[1] https://www.e-periodica.ch/cntmng?pid=sol-003:1994:69::643 (In German)