Foreignism(n.) Anything peculiar to a foreign language or people; a foreign idiom or custom.
Thesaurus Entries
Gothicism, Irish bull, Neanderthalism, age of ignorance, animality, antiphrasis, bad taste, barbarity, barbarousness, benightedness, benightment, bestiality, bombasticness, brutality, brutishness, cacology, cacophony, clumsiness, coarseness, colloquialism, corruption, crudeness, cumbrousness, dark, dark age, darkness, dysphemism, error, foreignism, gracelessness, grossness, harshness, heathenism, heaviness, ill breeding, ill-balanced sentences, impoliteness, impropriety, impurity, incivility, inconcinnity, incorrectness, indecorousness, inelegance, inelegancy, infelicity, lack of finish, lack of polish, lapse, leadenness, localism, malaprop, malapropism, misconstruction, missaying, misusage, misuse, neologism, paganism, philistinism, pompousness, ponderousness, poor diction, roughness, rudeness, savagery, savagism, sesquipedalianism, sesquipedality, shibboleth, slang, slip, slipshod construction, solecism, spoonerism, stiltedness, taboo word, tastelessness, troglodytism, turgidity, uncivilizedness, uncouthness, uncultivatedness, uncultivation, unculturedness, unenlightenment, uneuphoniousness, ungracefulness, ungrammaticism, unrefinement, unseemliness, unwieldiness, vernacularism, vulgarism, vulgarity, wildness