Anguish

Anguish
"Anguish is based on Brainf#%k (BF) except instead of using visible characters, it uses invisible ones. "
"Anguish is a language for true computer masochists who would love to question whether their program actually exists. However, the language does point out to us the reality of existence of Unicode characters that make sense in one domain but are outright dangerous in another. We already avoid some abusable characters in domain names and it's time to apply the same practice in other domains, such as programming languages."