> Taking those points in mind, I think there can be a lot of similarity when thinking around an equals sign and the verb is/to be.

I am cautious about this: In Spanish and Portuguese, there exist two "to be": ser and estar, which roughly refer to "general situation" vs. "current state".

For European Portuguese, pedrocr gave a nice explanation on HN in the past: https://news.ycombinator.com/item?id=12879529

So, don't confuse

  (Spanish)
  Tú eres linda.
  Tú estás linda.

  (Portuguese)
  Você é linda.
  Você está linda.

("you are gorgeous" (referring to a female person)). The second means that she is currently beautiful with a possible hint that she might normally be ugly.