If you live in a non US country, you will get troubles getting the original movie titles on imdb.com. This happens at least here in Germany.
Apparently imdb would check your IP and give you the titles released in the country you reside.
As of today I found out that the following imdb site would ignore the IP check and give you the titles in original.
Just start navigating to akas.imdb.com and enjoy original titles.
For example here is the Top 250 on imdb.com with original titles.