You will be able to switch between the English and Japanese songs when the game is released in July.
The European version of Beat the Beat: Rhythm Paradise (Rhythm Heaven Fever) will include the Japanese soundtrack along with the ability to switch between the English and Japanese songs for gameplay.
When starting up a save file, there is a button that allows you to select English or Japanese. The game text and song subtitles remain in English, but the songs for the mini-games will depend on which option you started with. It is possible to change languages at any time by going back and reopening the save file with the other option.
The extra soundtrack and European release date of July 6 were announced during the Nintendo Direct Europe event today. The feature was demonstrated then with the games Love Rap and Ringside.