there could be a variety of answers since in Africa they speak many languages. in fact one of them is English! another language i know they speak is Aribic in which case welcome would be مُرَحَّب بِه، مُحْتَفى بِه i have no idea how to pronounce that, but as i said before there is no certain language they speak so there are many answers to this question. I hope this helped you.
You say "hello" in English.
Say Hello to Rosita!
Kamusta is how you say hello
halito is how you say hello and how to say hello how are you is Halito, Chim Achukma?
This is how you say hello in Turkish: Merhaba = Hello
Crocodiles do NOT say hello.
In Neapolitan, you say "ciao" to say hello.
In Paiute, you can say "Kwai" to say hello.
hello hello
Irankarapte - Hello
hello same hello
In Tunisian, you can say "Marhaba" to say hello.