æ is in purely Latin words like ex æquo, et cætera, or curriculum vitæ, that’s all. œ appears in œil (eye) so you see that a lot more commonly already, but I can’t think of any other word that uses it off the top of my head (beside other derivated words like œillères). (pardon the puns)
Weird that France has both œ and æ. I only ever saw the latter in Nordic languages, but apparently it is occasionally used in French.
æ is in purely Latin words like ex æquo, et cætera, or curriculum vitæ, that’s all. œ appears in œil (eye) so you see that a lot more commonly already, but I can’t think of any other word that uses it off the top of my head (beside other derivated words like œillères). (pardon the puns)