A theory of interlanguage (IL) lexicons is outlined, with emphasis on IL
lexical entries, based on the HPSG notion of lexical sign. This theory accounts
for idiosyncratic or lexical transfer of syntactic subcategorisation and idioms
from the first language to the IL. It also accounts for developmental stages in
IL lexical grammar, and grammatical variation in the use of the same lexical
item. The theory offers a tool for robust parsing of lexical transfer errors
and diagnosis of such errors.Comment: Paper presented at COLING-94. 4 pages, Postscrip