Froth

Afrikaans

skuim (foam), roer (curl, move, stir, whip, whirl). (various references)

Albanian

shkumëzoj (effervesce, foam, lather, seethe), shkumë (fluff, foam, scum, skim, spume, yeast), nxjerr shkumë, mbulohet me shkumë, jargë (drivel, drool, slaver, slime, slobber, spittle), gjëra pa rëndësi (trivia). (various references)

Arabic 

‏كسا بالزبد, ‏زبد (bubble, churn, cream, foam, lather, scum, spume), ‏رغوة (foam, head, scum, spume, surf, work, yeast), ‏رغا (cream, effervesce, foam, lather, ramble), ‏شىء تافه (bagatelle, bauble, bosh, damn, duffer, dust, fluff, frivolity, gewgaw, hog, joke, piffling, small beer, tripe, triviality). (various references)

Bulgarian 

разбивам на пяна, пяна (foam, head, lather, spume), празнословие (claptrap, windiness), празни приказки (babble, eyewash, flim-flam, fudge, gas, jazz, natter, palaver, patter, piffle, talk, tittle tattle, twaddle, wind, yack), пеня се (bubble, churn, cream, effervesce, fizz, foam, froth up, fume, lather, scum, spume). (various references)

Chinese 

泡沫 (Foam), 漚 (bubble, drizzle, steep). (various references)

Czech

pìna (foam, lather, scum, skim, spume, whip). (various references)

Danish

skum (foam). (various references)

Dutch

schuim (foam), roeren (stir, whip, whirl), omroeren (whip, whirl), doorroeren (whip, whirl). (various references)

Esperanto

kirli (curl, stir, whip, whirl), ŝaŭmo (foam), ŝaŭmi (foam). (various references)

Faeroese

froða (foam), skúm (foam), røra (actuate, curl, move, stir, whip, whirl), píska (curl, stir, whip, whirl). (various references)

Finnish

vaahto (foam, scum). (various references)

French

écume (frothiness). (various references)

Frisian

skomje (foam), skom (foam), brûs (shower). (various references)

German

schaum (foam, lather, scum, spume), schäumen (foam). (various references)

Greek 

αφρός (foam), αφρίζω (foam). (various references)

Hebrew 

להקציף (infuriate, provoke), להעלות קצף (foam, lather), קצף (fizz, foam, frothiness, spume, yeast). (various references)

Hungarian

tajték (scum, spume, foam, lather), hab (foam, scum, spume, skimmings). (various references)

Indonesian

buih (foam, suds). (various references)

Italian

schiuma (foam, scum). (various references)

Japanese Kanji 

泡 (bubble, foam, head on beer). (various references)

Japanese Katakana 

あわ (bubble, foam, head on beer, millet). (various references)

Manx

keshal (effervesce, effervescence, fizz, foam, foaming, frothing, lather, lathering), kesh (fizz, foam, lather, scum, suds), barrag (cream, hoarfrost, sea foam). (various references)

Norwegian

fråde, skumme (fizz, foam, lather), skum (foam, lather). (various references)

Papiamen

skuma (foam). (various references)

Pig Latin

othfray.(various references)

Portuguese

espuma (scum), escuma (scum, spume). (various references)

Romanian

fleacuri (babble, bosh, bunk, cheese, fiddlededee, fiddle-faddle, flim-flam, gammon, humbug, odd trifles, skittles, tosh, tripe, whatnot), face spumã (churn, cream, fizz, foam, scum), spumega (foam, scum, spume), spumã (cream, foam, head, lather, scum, spume, suds), clãbuci (foam), clãbuc (foam, lather, saliva). (various references)

Russian 

вспениться, накипь (descale, incrustation, scale, scum, spume), пустословие (empty rhetoric, rant, song and dance, twaddle, verbiage, windiness), пена (foam, spume), пениться пена, пениться (cream, foam, seethe). (various references)

Scottish

cop (foam, spume), cobhar (foam). (various references)

Serbo-Croatian

trabunjati (haver, maunder, talk through one's hat), peniti se (fizz, foam). (various references)

Spanish

espuma (foam, scum). (various references)

Sranan

skuma (foam). (various references)

Swedish

skum (foam, scum), fradga (foam), skumma (skim, effervesce, foam, scum). (various references)

Turkish

saçma (absurd), köpürmek (be hopping mad, boil, boil over, bubble, churn, cream, effervesce, explode, fizz, fly off the handle, foam, lather, rage, ramp, ramp and rage, seethe, sparkle, yeast), köpürme (blast, blaze, effervescence, fizz, foaming, frothiness, rage), köpük çıkarmak, köpük (feather, foam, head, lather, mousse, scum, skimmings, spume, suds, yeast), boş lâf (applesauce, babble, balderdash, bosh, bunkum, comment, empty words, falderal, fiddle, fiddle-de-dee, flimflam, flubdub, flummery, fudge, gab, galimatias, garbage, gas, guff, haver, hokum, hooey, hot air, inanity, jazz, lark, moonshine, palaver, poppycock, punk, routine, small talk, talky-talk, tripe, vaporings, vapourings, waffle, wind, wishy-wash). (various references)

Turkmen 

kцpьrjiklemek (foam), agaran (foam). (various references)

Ukrainian

змилюватися, піна (bead, cream, foam, lather, offscum, ream, scum, skim, spume), пінитися (cream, effervesce, fizz, foam, mantle, ream, scum, spume), дурниця (absurdity, absurdness, applesauce, balderdash, ballyhoo, bosh, buncombe, humbug, mush, nonsense, piffle, poppycock, porridge, rigmarole, rubbish, sappiness, shucks, slum, trash, tripe). (various references)

Vietnamese 

chuyện vô ích chuyện phiếm. (various references)

Welsh

ewynnu (foam), ewyn (foam, surf), broch (anger, badger, bluster, tumult). (various references)

Yucatec

yoon (foam). (various references)