How to Say "heir apparent" in Spanish
The Spanish word for “heir apparent” is “delfín” — C1 level.
English → SpanishC1
nounC1formal
political or business context

Examples
El ministro de economía es el delfín del presidente.
The economy minister is the president's hand-picked successor.
Muchos se preguntan quién será el delfín en el partido político.
Many wonder who will be the chosen successor in the political party.
El delfín de Francia vivía en el Palacio de Versalles.
The Dauphin of France lived in the Palace of Versailles.
Using the Feminine Form
Unlike the animal meaning, when referring to a woman who is a successor, you CAN use the feminine form 'la delfina'.
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