[Israel.pm] text lexical analyzing

[VladimirB at ladpc.co.il]

Are someone know about module for text lexical analyzing? 
I need some tool to determinate in plain text file (in fact - source file of Cobol program) strings are appropriate to words of regular English. For example: string 'CALL' is true, and 'CLL' - isn't. 

Vladimir M. Bronfman
Development Department
LADPC Inc
Petah Tikva, Israel
www.ladpc.co.il/eng