An EFL classroom is in a country where English is not the dominant language. Students share the same language and culture. The teacher may be the only native English speaker they have exposure to. Outside of the classroom students have very few opportunities to use English. For some, learning English may not have any obvious practical benefit. Students have limited exposure to English-speaking culture, most often through a distorted lens like TV or music.
Based on these definitions, we can see that there are important differences in the student population. Effective lesson planning must take them into account.