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.