en materia de
التعريفات والمعاني
== Spanish ==
=== Preposition ===
en materia de
when it comes to, in matters of, regarding
=== Further reading ===
“en materia de”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025