A colloquialism is a casual expression that is used extra frequently in relaxed conversation than informal speech or writing.
The CEFR categorises language proficiency into six levels, A1–C2, which can be further subdivided based on the needs of the local context. Levels are defined by 'can-do' descriptors. The levels did not appear out of nowhere in 2001, but rather evolved over time, as described below.
Meaning of Colloquialism-
These expand in language via years of informal communique among acquainted speakers.
Colloquialisms are not "substandard or illiterate speech," says Maity Schrecengost. Not observed everywhere, colloquialisms are phrases and terms that we research at domestic in place of at school," (Schrecengost 2010).
Etymology: From the Latin "colloquium", meaning "conversation"
Example of Colloquialism-
"Friends of the chancellor discovered that he had defined Labour MPs as disappointing 'numpties,' a colloquialism that means idiots," (Rafferty 2004).
"Latinas are in oppressive structures. We can idiot ourselves, however we might nevertheless be getting dumped on," (Padilla1997).
Based on these accomplishments, the CEFR has developed a description of the process of mastering an unknown language by type of competence and sub-competence, using descriptors for each competence or sub-competence, which we will not go into further detail here. These descriptors were developed without regard for any particular language, ensuring their relevance and universal applicability. The descriptors describe each skill's progressive mastery, which is graded on a six-level scale (A1, A2, B1, B2, C1, C2). For further information you can visit SpeakoClub and improve your knowledge about CEFR.