The research was conducted to find out the relationship between Language Competency and Stammering. A pilot study was conducted in which Urdu version of Test of Language Competence (TLC) was administered to speech disabled and normal group. In the second phase, both groups (N = 34, age range 18-28 years, males, education: O levels to Graduate Level) were given both English and Urdu version of TLC. Results showed that stammering people performed significantly poorly on TLC as compared to normal group. On the basis of this study it is seen that language competency is less in speech disabled group.