The phrase "we feel proud" is correct and usable in written English. You can use it whenever you want to express a feeling of pride. For example: We feel proud of our accomplishments this past year.
We feel proud of the motherland".
Grün mused, "Can we feel proud of our history?
We feel proud now and we want a dignified life".
"We feel proud because we're changing China," he said.
"But when we can stop a marriage we feel proud, and we are happy".
"We feel proud that we found a way to defy the situation," said Najar.
"We felt proud of ourselves when we passed her.
For the first time in years, we felt proud to root for the Bills.
Trusting and caring for strangers who need it is a British tradition that we felt proud to become part of.
Wasn't that one of the moments when we felt proud of New Labour, when Britain was behaving as Britain was supposed to behave?
It started with the meat in the freezer and, when mixed with a bag of rice and steamed veggies, we felt proud of our healthy meal.
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union