How to Change Action Button for Video Chat?

I need to change the name of the Action Button on the Profile for Video Chat to just Chat because I only use embedded video.  I can't seem to located where to change the name.  I looked in the BxBaseProfileView.php.  Since this is an Action that is added after a person logins, I am not seeing it.

Any Help?

Anyone help out there?

http://www.sitename.com/administration/lang_file.php?&filter=Video%20Chat

and

_messenger_actions_item (Boonex Messenger) Edit

OR

_messenger_invitation_title (Boonex Messenger) Edit

I am not able to figure it out still.  Can anyone else help?

File Name:

Code to Locate:

Code to Change to:

as belami25 has said

Admin/Settings/Languages Settings

bellow box Manage Keys

Look for: Video Chat -> then click on apply

Edit language key

_messenger_actions_item

_messenger_invitation_title

Thank you OkWeb!  I was look for a file and not through the admin panel.