In the present monograph types of heterolingual oppositions "German vs. (American) English" at different levels of the system of the modern German literary language are analyzed. The phenomenon of the heterolingual variability is caused by an invasive borrowing English-Americanisms which constitute with autochthonous words of German various paradigmatic relations. The work is intended to German scholars, translators, lexicographers, will be useful for graduate students and those of faculties of foreign languages as well.