What does that have to do with anything? Statistic significance has to do with confidence intervals and sample sizes at the same time, so even a small sample size with a large effect has statistical significance, but a very small effect at a large sample size might not.
Could you point to a good article or tutorial on statistical significance, sample size, confidence intervals etc? I'd like to know how to analyze experimental results myself.
76 is pretty large for a psych study and, if the effect size is large enough, a perfectly reasonable sample size to generalize from.
but in this case, to be able to generalize you would need speaker of many languages, otherwise it quickly becomes "people who know english can guess the meaning of adjectives".
Moreover, I fear the same would still be true because they speakers would presumably already need to know english to participate in the study.