Most, If not all Japanese Tamagotchis, are fun and easy to understand even without any knowledge of the language. I have an all Japanese Tamagotchi collection and yet I have no problem understanding it. Sure, you might get confused at first, but once you get the hang of it, you'll find it more enjoyable and more fun. The Tamagotchi ID-L, which is the second latest Japanese tamagotchi, has an English version. I would not recommend this as they are known to have a lot of bugs/errors when you can have a Japanese one with a lower price.
I suggest you buy the P's or the ID-L as they have a lot of features and they're really fun.
You may want to take note that the latest Japanese Tamagotchi, which is the P's, is kinda text-heavy. It is text-heavy due to interaction among characters and just conversations and isn't really important.