hawaiian

• 'a'ole pilikia (you're welcome) [..-kee-yah]
• a hui hou (until we meet again)
• aloha (acknowledging time/space/relationship within your community)
• e kala mai (sorry/excuse me) [.. mah-yee]
• mahalo (thank you)

japanese

• arigatō (thanks)
• ee (yes (informal))
• gomen nasai (i'm sorry)
• hai (yes (formal))
• hajime (begin!/go!)
• iee (no (formal))
• itadakimasu (enjoy your meal) [..-mas]
• iya (no (informal))
• konnichiwa (hello, good afternoon)
• kudasai (please)
• mondai nai yo (no problem)
• moshi moshi (hello (on the phone))
• ohayou (good morning)
• sayounara (farewell)
• suki desu (i love you) [ski dess]
• sumimasen (excuse me)

chinese

• bù (no) [.bo]
• bù hǎo yìsi (excuse me) [bu ha jiso]
• bú yòng xiè / bú kèqi (you're welcome) [bo jang sche / bu katschi]
• nǐ hǎo (hello)
• nǐ hǎo ma? (how are you?)
• qǐng (please) [.tsching]
• shì de (yes) [sche da]
• xiè xie (thank you) [schie sche]

french

• à propos (by the way)
• au revoir (goodbye)
• bon appétit (enjoy your meal)
• bon voyage (have a nice trip)
• bonjour (hello/good morning)
• bonsoir (good afternoon)
• c'est la vie (such is life) [se lavi]
• déjà vu
• en masse (in a large group, many)
• excusez-moi (sorry/excuse me)
• faux pas (social blunder)
• folie à deux (delusion shared by two people)
• je t'aime (i love you)
• merci (thank you)
• non (no)
• oui (yes)
• par excellence (the best example)
• pardon (sorry/excuse me)
• salut (hello)
• vis-à-vis (with regards to (lit. face to face))

spanish

• adiós (goodbye)
• buenas noches (good night)
• buenos días (good morning)
• de nada (you're welcome)
• hasta la vista (until i see you)
• hola (hello)
• mi casa, su casa (my home is your home)
• (muchas) gracias (thank you (very much))
• pardón (sorry)
• por favor (please)
• salud (cheers)
• te amo (i love you)

latin

• ad absurdum (to the point of absurdity)
• et tu, brute? (you too, brutus?)
• exempli gratia (for example)
• gloria mundi (glory of the world)
• persona non grata (unaccaeptable person)
• prima donna (a temperamental and conceited person)
• quid pro quo (a favor that is expected to be returned)
• status quo (the existing condition)
• vice versa (the other way round)

other

• greek
  • eureka (i've found it)
• māori
  • kia ora (hello/goodbye/cheers) [kiˈaɔɾa]
• swahili
  • hakuna matata (no worries)
• yiddish
  • mazel tov (congratulations (lit. good luck))
  • oy vey (oh boy (lit. woe is me))

fictional

• dothraki
  • ase shafki athdrivar (your wish is my command (lit. your words are death))
• parseltongue
• simlish
  • sul sul (hello)
• vulcan
  • ashaya ⋯ love (not canon)
  • ashayam ⋯ beloved (not canon)
  • Dif-tor heh smusma ⋯ live long and prosper
  • koon-ut-kal-if-fee ⋯ marriage or challenge
  • kroyka ⋯ stop!
  • Sochya eh Dif ⋯ peace and long life
  • t'hyla ⋯ lover/friend/brother