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Albanian

i qetë (at ease, balanced, calm, canny, collected, comfortable, comfy, composed, cool, cool-headed, dispassionate, easeful, equable, even, even-minded, halcyon, level, level headed, mild, noiseless, orderly, Pacific, passionless, peaceable, peaceful, placid, quiescent, quiet, reposeful, retired, secure, sedate, self possessed, serene, settled, silent, smooth, sober-blooded, stationary, still, stilly, tranquil, unconcern, unconcerned, uneventful, unruffled), i patrazuar (comfortable, comfy, heart-whole, imperturbable, level, peaceful, placid, smooth, unabashed, unadulterated, unblended, unconcerned, undigested, unperturbed). (various references)

Arabic 

‏مسترخي (slack, sleepy), ‏هادئ (calm, cloistered, composed, cool, dispassionate, easygoing, even, impassive, imperturbable, peaceable, peaceful, piping, placid, possessed, quiescent, quiet, reposeful, restful, self possessed, serene, sober, steady, still, tranquil, undisturbed, uneventful, unflappable, unmoved, unruffled, windless). (various references)

Czech

uvolnìný (disengaged, lax, loose, relaxed, released, unbuttoned, unstrung), neformální (casual, informal, unceremonious), klidný (calm, collected, composed, cool, easy, halcyon, impassive, imperturbable, Pacific, peaceable, peaceful, placid, quiescent, quiet, reposeful, restful, secure, sedate, self possessed, serene, silent, smooth, sober, still, temperate, tranquil, uneventful, unmoved, unperturbed), bezstarostný (carefree, careless, cavalier, easy, easygoing, free from care, gay, happy go lucky, jaunty, light hearted, light-headed, reckless, slaphappy, unconcerned). (various references)

French

tranquille, décontracté. (various references)

German

unverkrampft, gelassen (calm, coolly, tranquil, unperturbed, unperturbedly), entspannt (relaxed, relaxes, slackens, unbends, uncocks), cool (cool, fair, safe, smooth, together). (various references)

Hebrew 

ננוח (at ease, calm, debonair, indolent, relaxed). (various references)

Hungarian

lesimított (planed), hátrasimított. (various references)

Italian

disinvolto (casual, easy, informally, jaunty, offhand). (various references)

Pig Latin

aidlay ackbay.(various references)

Russian 

спокойный (composed, even-minded, placid, sober-blooded, tranquil). (various references)

Serbo-Croatian

ležeran (comfortable, easygoing, leisure, leisurely, mellow, relaxed), olabavljen (lax, relaxed). (various references)

Spanish

relajado (relaxed). (various references)