What does effective use of idioms indicate about a speaker's language skills?

Effective use of idioms demonstrates a speaker's strong contextual understanding and fluency in the language. Idioms are expressions whose meanings are not deducible from the individual words, so using them correctly requires insight into cultural nuances and the ability to interpret the context in which they are relevant. This proficiency indicates that the speaker has moved beyond basic language skills and has reached a level of fluency where they can understand subtleties and convey meaning more richly.

Utilizing idioms can enhance communication by allowing the speaker to express complex ideas in a concise and relatable manner. It reflects an ability to navigate the language in a way that resonates with native speakers or those highly familiar with the culture the language represents. Consequently, a speaker's use of idioms showcases not only their vocabulary but also their grasp of informal language styles, which are crucial components of effective communication.