The word "entrepreneur" originates from the French verb \textit{entreprendre}, meaning "to undertake." Its modern application, dating back to 18th-century France, refers to individuals who establish businesses and assume financial risks for profit. Consequently, the language of origin is definitively French.
Option (A) French: Correct. The word is derived directly from French.
Option (B) Latin: Incorrect. While Latin influenced French, the term "entreprendre" is of French origin.
Option (C) Greek: Incorrect. The root has no Greek origin in this context.
Option (D) German: Incorrect. The term is not derived from the German language.