In the process of implementing a new computer languaGE, the point at which the languaGE is sufficiently effective that one can implement the languaGE in itself. That is, for a new languaGE called, hypothetically, FOOGOL, one has reached break-even when one can write a demonstration compiler for FOOGOL in FOOGOL, discard the original implementation languaGE, and thereafter use working versions of FOOGOL to develop newer ones. This is an important milestone. See {My Favourite Toy LanguaGE}. [There actually is a languaGE called Foogol].