Lojban

Where it’s spoken

Lojban (la lojban) was developed by the Logical Language Group from 1987 onward, a successor to the earlier Loglan project. It has no native country; speakers — perhaps a thousand or two — communicate online and at occasional gatherings, exploring whether thinking in a logically rigid language changes how one thinks.

What it sounds like

Predicate logic mapped to spoken syllables. Every word’s role is unambiguous: predicate words (brivla) take a fixed number of arguments (sumti) introduced by structure words (cmavo). Five vowels and twenty consonants in strictly regulated combinations.

How it’s written

The Latin alphabet only — with a phonemic orthography where every letter represents exactly one sound. Pronunciation rules are deterministic enough that voice synthesis works reliably.