Three types of expression coexist in ≪No-geol-dae≫ and ≪Chung-ui-jig-eon≫ to convey the same meaning. From the Chinese historical point of view, the first type is the use of the original expression form or vocabulary, the second is the use of a new expression form or vocabulary, and the third is the use of the form which the two are converged.
Considering that these mainly appeared in the Yuan·Ming Dynasty, the language convergence could be seen as a phenomenon that resulted from the contact of different languages.
Language convergence is a phenomenon emerging at the process of change. Language convergence appears in two types of forms: grammatical and lexical; whereas the two forms slightly vary.
Convergence in the grammatical composition is expressed as ‘A + X + B (preposition + NP + postposition)’ or ‘A+…X…+B’ format.
Convergence in the lexical composition appears in the form of ‘AB (or BA)’ by directly attaching the new and old components of the same meaning; superimposed such as ‘Shuodao說道·jiubian就便·bianxiang邊廂.
Language convergence is a linguistic phenomenon that results from the necessity of change in recognizing the language components, after the contact of two languages. It is one of the language change rules, which is valuable as an important standard to figure out the period of language change.