Apple has changed their API, and removed the language code from the URL, so you should only the bundleId for the app you are looking for. For example:
http://itunes.apple.com/lookup?bundleId=com.yelp.yelpiphone
In addition, you can add the country parameter to the query, to get results for a specific country App Store.
For example:
http://itunes.apple.com/lookup?bundleId=com.yelp.yelpiphone&country=de
The description, user rating and other fields might change between different App Store countries.

Apple has changed their API, and removed the language code from the URL, so you should only the `bundleId` for the app you are looking for. For example:
>http://itunes.apple.com/lookup?bundleId=com.yelp.yelpiphone
In addition, you can add the country parameter to the query, to get results for a specific country App Store.
For example: >http://itunes.apple.com/lookup?bundleId=com.yelp.yelpiphone&country=de
The description, user rating and other fields might change between different App Store countries.