In the process of establishing the elective subject Speech and Language in the 2022 Revised Curriculum, the previous achievement standards related to “Language and Humans” and those related to Korean historical linguistics were integrated and reorganized into [12SL01-01]. The integration of achievement standards, which was inevitable for reducing educational content, represented a novel attempt to overcome the limitations of traditional Korean Historical Linguistics Education, which has long treated language change in isolation from human factors. However, in Speech and Language textbooks, the educational content of “Language and Humans” and Korean Historical Linguistics Education remains distinct, failing to realize an organic connection. Furthermore, some textbooks utilize educational content and linguistic examples extensively employed in previous textbooks. To address these issues, this study proposes new linguistic examples: the polysemy of intention and prospective aspect, changes in the realization patterns of honorifics, and the disappearance of the words buyda and mozida. These examples serve as valuable subjects for inquiry, highlighting the influence of humans on language change from a broader perspective. The identification of more diverse linguistic examples for human-focused language inquiry is expected to produce richer, more meaningful educational content.