We extend our previous work which examined the effect of first language (L1) on the perception of Tashlhiyt gemination by adding three groups of participants from Korean, Mandarin, and Mongolian backgrounds. Tashlhiyt permits gemination for all consonants in all word positions, whereas the incidence of gemination differs in the participants’ L1s: the lowest in Mandarin, the highest in Korean and Mongolian. This study aims at better understanding non-native perception of consonant gemination. The participants responded to 200 trials of an AXB discrimination task. The overall mean accuracy was 76%, 67%, and 77% for the Korean, Mandarin and Mongolian groups, respectively. All groups had much greater difficulty in word-initial position, although this was modulated by consonant type. (A lesser differential was found for /s/-/ss/ than the other contrasts in all groups.) Overall, the new data are consistent with our earlier proposal that initial and non-initial gemination engage different perceptual processes.