How to change Appstore language
Have you tried the following?

Go to Settings.
Tab iTunes &amp; App Store.
Tab your Apple ID and then Sign Out.
Now Sign In and choose Create New Apple ID (you won't complete this, don't worry).
You'll be asked to choose your store (country/region), choose the country which has the language you want the AppStore to be in (Romania or United States in your case).
Click Next and then Agree.
Fill in the information until you're asked to insert your credit card info.
When you reach the credit card info, click Cancel and exit the Create New Apple ID section.
Go back to Settings and sign in with your actual Apple ID.
Open the App Store and everything should be in the language you picked.

Links
I found this tutorial, which explains the steps I have listed above.