Which element is involved in Language Proficiency? 

I. Fluency 

II. Accuracy 

Language proficiency is a measurement of how well an individual has mastered a language. Proficiency is measured in terms of receptive and expressive language skills, syntax, vocabulary, semantics, and other areas that demonstrate language abilities. 

Key Points

• Fluency in language learning is the ability to use the spoken or written form of the language to communicate effectively. While fluency does require a reasonable knowledge of vocabulary and grammar, the language produced does not need to be flawless as long as you are able to be clearly understood. At the fluent level, a speaker will have fluid speech as opposed to halting use. Generally, a person who is fluent in a foreign language will show mastery in the following areas:
  •  Read: the ability to read and understand texts written in the language.
  •  Write: the ability to formulate written texts in the language.
  •  Comprehend: the ability to follow and understand speech in the language.
  • Speak: the ability to produce speech in the language and be understood by its speakers.
• Accuracy refers to how to correct learners' use of the language system is, including their use of grammar, pronunciation and grammar. In other words, accuracy is the correct use of tenses, verb forms, collocations and colloquialisms, among other things.

Thus, it can be concluded that fluency and accuracy are involved in language proficiency.