In Spain, would I say "Estoy planchar" or "Estoy planchando"?
I am more likely to visit Spain than to visit the Spanish speaking countries of the Americas. Presumable, both forms would be understood. By the way, I am not actually planning to do any ironing in Majorca!
You can never say "Estoy planchar" because planchar is to iron.
You must say "Estoy planchando" I am ironing.
Here's a humorous aside...If you say (in Spain) "Estoy planchado/planchada" - you've just said that you've been run over by a car!!
You cannot say Estoy Planchar because you would be saying "I am to iron. Estoy planchar would be best