Awareness of vocabulary introduced from other languages at different phases of the language will give students a sense of the color of different words.
In particular, the numerous words of Latin origin remind us that Greek was one of the two predominant Roman languages, and that Greeks called themselves Romans until very recently.
Turkish words are a strong marker of the L level of “cultural intimacy” described by Michael Herzfeld. The effort to eliminate them from Greek since the 19th century–Να ξετουρκέψουμε τη γλώσσα μας, as the title by Γιάκωβος Σ. Διζικιρίκης has it, has been an ongoing project of all forms of modern Greek purism.