I noticed this some time ago, there was some tweet in Portuguese that I noticed I could kinda read by using the context of the words that I do understand.
To see what I mean just look at how similar these are:
ES: Hola, ¿Cómo estás?
PT: Olá, como está?
ES: Buenos días
PT: Bom dia
ES: Dinosaurio
PT: Dinossauro
If you understand Spanish but not Portuguese (or the other way around) I invite you to try to read the one you understand, it’s wild just how similar they are.
Depending on the accent, I can follow along to a Portuguese or Italian conversation too. Reading is much easier though