The USA version contains the text in British English, French, German, Italian and Spanish from the European version hidden in its data. These patches allow you to see that text, meaning you won't have to stick with 50 Hz if you want to play this game in these languages anymore.
Download link: https://www.mediafire.com/file/shfhp98zoepssew/gtlanguages2.0.zip/file
Gran Turismo (USA v1.1)
File/ROM SHA-1: 5433C55806F7CD5CA2E42A6C39FF816D442ED6B6
File/ROM CRC32: 2B3845AA