Can you help me come up with different ways of saying something as simple as "Hello"? Preferably through email. It can be as creative as possible

What I've come up with:
>Different world languages (whatever Google Translate has)
>Pig latin
>Morse code
>ASCII art
Fictional languages like
>Elvish (Sindarin and Quenya)
>Na'vi from Avatar
>Gallifreyan (visual language from Doctor Who, can be sent by email as an image attachment)

What else?