Amateur
A word means a language that no longer uses as a mother tongue. In general, this phenomenon occurs when one language is replaced by another language, such as the Coptic language replaced by Arabic, or Native American languages replaced by English, French, Spanish, and Portuguese. In addition to this substitution, rapid language variation can eventually lead to a different language, resulting in the former language becoming more sophisticated. Today, the languages of the Romance language originated in Latin, but as each language became a language, each language became Latin. Sanskrit and ancient English also correspond to this case. In some special cases, the language that has been killed in this way is often left in the fields of science, law, and religion. Sanskrit, Latin, ancient Church Slavic, and Avestan are examples of this.