Which term describes the language shared between lovers and twins, often including intimate expressions?

The term that best describes the language shared between lovers and twins, often characterized by intimate expressions, is intimate language. This type of language goes beyond conventional communication, incorporating special phrases, inside jokes, and unique expressions that convey deep emotional connections and shared experiences. It reflects a close relationship where personal feelings and bonds are prioritized over formality or technical specificity.

In contrast, casual language refers to informal communication that may not carry the same depth of meaning or emotional resonance as intimate language. Technical language pertains to precise terminology used in specific fields, such as science or computing, making it unsuitable for expressing personal connections. Professional language emphasizes formality and adherence to standards in a workplace context, which is distinctly different from the affectionate and personalized nature of intimate language.