Switch on interlingua debugging; relevant to translation applications that use an interlingua checking grammar. In this mode, translations that give rise to interlingua that is ill-formed according to the interlingua checking grammar are processed by subjecting the ill-formed interlingua to all possible insertions, deletions and substitutions of a single interlingua element, until either a well-formed variant is discovered or a timeout is exceeded. The first well-formed variant found is displayed.