I definitely would like to have a section with grammatical explanations and examples for these kind of issues. "ficar" is a bit like "to get" in English, a verb that can take many different meanings. For sure, to give the Dou users a minimized version in the explanation/conjugation box leaves us very frustrated. My suggestion is that instead of a translation exercise, first model the use of the verb in sentence with a picture like it is done with other vocabulary, or at least give the users a warning that the verb can be used in many ways according to the context of the sentence and suggest a grammar link to learn about it.
"She is with the red skin." is a good translation? Is it a current phrase these days in US? DL marked it wrong. The Longman Dictionary teaches us "She goes red." = "Ela fica Vermelha." but I wonder you...the verb "ficar" is normally translated as the verb "to be" = "ser" or "estar". The last is the case here. I t is a current situation. I think the translation "She blushes" = "Ela cora." or "Ela está corada." is strange. It means...Her skin is with good condition at the moment, not necessarily red. Some help, please.
"She is with the red skin." is a good translation? Is it a current phrase these days in US?
"goes red" is apparently in use in a relevant context in Ireland; in the U.S. I do not believe it is; if anything, it likely refers to getting one's hair dyed red
"She blushes" refers to a general tendency. "She's blushing" refers to a current situation. At least as of a few months ago, seems like it wasn't accepted. So "Ela fica vermelha" can't mean "She blushes" in the sense that, from time to time, she experiences blushing? Doesn't "fica" also normally mean "becomes"? It's a surprise to me that that couldn't apply here.
I think the translation "She blushes" = "Ela cora." or "Ela está corada." is strange. It means...Her skin is with good condition at the moment, not necessarily red.
Not sure I understand this. Are you defining "corar"?
Well, I am not sure if it can apply here or not. I'm not a native speaker and I am trying to understand that phrase in English. Related to your question, "corar" means that the person have the color of the skin in good condition, apparently or when someone comments "Você está corado." or "Você está com a cor boa." It means you have the color of the skin in good condition for the eyes of the person you are talking to..I hope it clarifies a little...