This study examines the awareness and perceptions of intermediate to advanced level. Thai learners of Korean compared to native Korean speakers, with regard to the differences between male and female utterances and utterable genderlects. The research questions are as follows: (1) Do Thai learners, compared to Korean native speakers, make different judgments regarding Korean utterable genderlects and perceiving the attitude? (2) Is Thai learners’ understanding of the obviousness of gender preferences in utterances different to that of Korean speakers? In this study, samples of utterable genderlects were extracted from the categories of phonemes, vocabulary, grammar, and pragmatics. The data were analyzed using a frequency analysis and chi-squared test. The analysis showed that the highest deviation between Thai learners and native Korean speakers was in the category of pragmatics, implying that pragmatics is the most challenging aspect of acquiring utterable genderlects. Moreover, Thai learners were, in general, well-aware of utterable genderlects with more obvious gender preferences, especially female utterances. Therefore, it can be said thatThai learners are not uniformly different from native Korean speakers in understanding utterable genderlects. Results from such studies should be reflected in the field of Korean language education.