BuddyPress.org

Hello everyone. I followed a guide to change the default name of the post. And now from wordpress administration it’s all ok.
On the workflow of activities, however, each time a user enters a post continues to exit:”User x has entered a new post”.
How do I make him understand to Buddypress that he doesn’t have to use the word “post” anymore and uses the word I chose?
I also tried to change the translation file, but this is temporary and does not always work.
Thank you very much to those who will help me because I really don’t know how to solve it.