There’s a lot of similarities between Brazilian Portuguese and Spanish. Most Portuguese speaking people can understand basic Spanish but it’s harder for Spanish speaking people to understand Portuguese.

At least that’s what my wife tells me as a Spanish native ~150 days into learning Portuguese.

Basque is also there and a completely different language family.

Hungary opens a beer and smiles...

It's often said that a language is just a dialect with an army.

Portuguese and Spanish (Castilian) are more closely related than Castilian is to Catalan. Yet Catalan is often classified as a dialect of Spanish than a language in its own right.

I have no idea which language you're referring to!