Joke: SYN (the initial part of the TCP handshake), with Y treated as /j/.
The root referring to the ethnic group that speaks this language.
Derived from the name of my character Celia (assuming the <i> is realized as /j/).
Joke: SQL injection.
Joke: SATB (B > P to match phoneme inventory)
No joke, but inspired by Chinese sì 'four' and the English death, which the Chinese word is a near homophone for.