It means the same thing. Achi is simply a combination of "My" (Sheli) and "Brother" (Ach). It's a shortcut, if you will.
Patrick Achi was born in 1955.
Achi Brandt was born in 1938.
Ghassan Gedeon-Achi was born in 1993.
William Charles Achi died in 1928-12.
William Charles Achi was born on 1858-12-16.
It can be either said as "ach sheli" or as "achi" either one- it doesn't matter
a male saysאני אוהב אותך, אחי. אלהים בירך אותי בךani ohev otcha, achi. Elohim berech oti bechaa female saysאני אוהבת אותך, אחי. אלהים בירך אותי בךani ohevet otcha, achi. Elohim berech oti becha
Bhalo achi, dhonno badh. But you would really just say bhalo achi. The 'ch' is like cherry.
The correct sentence is: "Dahi achi hoti hai" as 'dahi' is a feminine noun in Hindi, so the correct form of the adjective 'achi' should also be feminine to agree in gender and number.
You can say "আমি ভালো আছি" (Ami bhalo achi) to say "I'm okay" in Bengali.
Luis doesn't mean anything in Hebrew. Only Hebrew names have meaning in Hebrew.