Interlanguage development may take several months or a year and relates to performing in academic classes using advanced terminology; this is most closely associated with which concept?

• A. Language Acquisition
• B. Bics
• C. Interlanguage
• D. Calp

Answer: (D)

CALP, or Cognitive Academic Language Proficiency, is the level of language needed to understand and express academic content with advanced vocabulary and concepts. The stem highlights performing in classes using specialized, school-based terminology, which is exactly what CALP describes—the language that supports learning across subjects, not just everyday conversation. BICS covers casual, social language, which isn’t the focus here. Interlanguage refers to the learner’s evolving internal system in the target language, a developmental stage rather than a specific domain of academic language. Language acquisition is the overall process of learning a language, not this particular academic-specific capability.