This is surely interesting..so many diverse backgrounds mashallah...
I'm the boring one amongst you..I speak Arabic..so all I have is
*akhi* and
*ukhti*..*sigh*
I wish I still remembered the Kurdish I learned when I was little so I would've shared the words with you all..but unfortunately I forgot it due to my rarely speaking it
But I know the words in Maltese so I'll share them (too long of a story to tell you how I learned them lol)
Brother ---> Hu
Sister ---> Oht
The word Oht is almost EXACTLY like the word for *sister* in Arabic which is Ukht/Okht (depending on how you latinize it)..which makes sense since 40% of the Maltese language is Arabic..Arabic speakers would not find a problem communicating there seriously!

..sooo..that was my little trivia along with my life story for the day..lol..and now I will say my salams and leave the thread..ehm!