There is no "Singapore language." Singaporeans consists mainly of Chinese, Malay, and Indians and each speak their own language and/or English.
How do you say hello in Singapore language
How are you in Singapore: " Eh! Hello, you!, you good? Good! Okay okay steady steady."
If in your question, "Singapore" is a language, then well, you still say Good Day. Otherwise, people greet with whatever language or way they are used to, be it "Hi", "Hello", and similar meanings in any language they prefer to greet in.
Majority of Singaporean can speak English, so a simple "Hi", or "Hello" is good enough
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.