Here are some examples:
* Je suis fier de toi. (I am proud of you.)
* Elle est fière de ses origines. (She is proud of her origins.)
* Ils sont fiers de leur travail. (They are proud of their work.)
However, depending on the context, you might also use:
* Orgueilleux (Prideful, arrogant) - This word carries a slightly more negative connotation than "fier".
* Vaniteux (Vain, conceited) - This word is even more negative than "orgueilleux" and implies a sense of excessive pride.
It's important to consider the nuances of these words when choosing the right translation.