If various color names are printed in various color inks, an observer has great difficulty in rapidly naming the ink colors (Stroop Color Word Test) unless the color names and the ink colors are mutually reinforcing, or the color names are unknown to the observer. The latter suggests a partial measure of second-language fluency, the feasibility of which was examined by administering a bilingual version of the color word test to four groups of four college students each whose familarity with French differed. Results showed that when the color names are French and the subject names the ink colors in English, greater familiarity with French is associated with greater interference in naming. However differences between the groups in average naming time were not statistically significant.