Here they're in Arabic :)

Hi: Salam سلام

Thank you: Shokrun شكرا

Bye: ma'asslamah مع السلامة

These are typical Australianisms (but yes, we do speak English!):

Hi = G'day (A shortened form of "good day", but the beginning is pronounced like the beginning of "Gdansk". We can use this at ay time of the day or night.)

Thanks = Ta / Cheers (These are also in UK English.)

Goodbye = Hooroo / Hooray (These are slighly old now, and "hooray" is two strong and distinct syllables; it's not the shout "hooray".)

In French :

- Salut (Hi)

- Merci (Thank you)

- Au revoir (Bye)

Hi = Oi

你好

Here's Polish version:

hi / bye - cześć

thanks - dziękuję / dzięki