Where can I change this word?

I'm sorry to ask you every time but it's changed every time after upgrade to the new version. Where can I change this word http://screencast.com/t/EKaji8S4ZKL and this http://screencast.com/t/uvvC7Ung or how can I use easysocial's english file instead of Thai language which I use to be my main language http://screencast.com/t/nQjj4Omr because I don't want to ask you every time I upgrade.