By the way, i create subfolders as below in my child theme directory and put compose.php in it:
/wp-content/themes/kleo-child/buddypress/members/single/messages
i tried to change label name “friend” to “friiiiend” and result was no change :/
i think i am missing something, what you think?
<label for="send-to-input"><?php _e("Send To (Username or Friiiend's Name)", 'buddypress' ); ?></label>