The menu on the cartridge is all in English.
I'd recommend this cartridge as well. For me, it works fine on a real Famicom, and as for the games, it contains a lot of early Famicom games, some few NES games from 1985-1990, some later games as well as some rare and expensive games to be found on official NES/Famicom cartridges. Also, CoolBoy decided to put some NiceCode DreamGear games here, which was kind of a bad idea, but other than that, it's probably the best multicart I've ever come across.
And, I am not sure if anybody would be interested in it, but I made a text review about in in February of this year, which you can read here: http://somerussianmariodude.blogspot.ru/2014/02/400-in-1-real-game-famicom-review.html