Stray Kids members can speak several languages, including Korean, which is their native language, and English, which some members are very good at. Bang Chan and Felix are fluent in English because they grew up in Australia, where they learned English in school while speaking Korean at home.
Seungmin is also very good at English, having lived in the United States for a while. Hyunjin has practiced English and has even spoken it during live streams, although he might not be as fluent as Bang Chan or Felix. Han and Changbin are getting better at English, with Changbin improving his comprehension and speaking skills over time.
As for Japanese, Stray Kids have released several Japanese albums and singles, indicating that they have some proficiency in the language. Lee Know is often noted for his clear pronunciation in Japanese, making him easier to understand when speaking or singing in that language. However, the group’s overall Japanese language skills vary, and they might not all be equally fluent.
Overall, Stray Kids members have a good grasp of Korean and varying levels of proficiency in English and Japanese.