Loglang

I think that NGL sounds like a loglang. (I confess I have not read the NGL thread.)

For example, from 1955 the sociologist and science fiction writer James Cooke Brown invented a loglang called 'Loglan', created to test out the Sapir-Whorf hypothesis in linguistics[…]

The most notable well-developed examples of loglangs are James Cooke Brown's Loglan (1960) and its derivative Lojban, which was developed between 1987 and 1997 by the Logical Language Group (Cowan 1997).