It's oftentimes a running joke in Japanese media how the general populace are required to learn English as a second language, but most of them almost always fall flat when it comes to practical use due to it's purported "difficulty". As a Japanese language student, I find myself befuddled by this mentality mainly because English is built on just a few simple rules, whereas Japanese has more complicated quirks, leading a handful of frustrated people to call it "The Language Of The Infinite".
To make the "Language Of The Not-So-Infinite" less difficult, a few English-themed edutainment games have been circulating around. Of course, with the still-prevailing moe culture among otaku fandom, decrypting the lingo will bear more fruit when you feature cute 2D girls as your virtual tutors. Unfortunately, most of these games still fall under the hit-or-miss category, with one or more factors (uncomfortable testing system, poor seiyuu diction, etc.) ruining the whole thing. Mirai Shonen's Moe Star: Moeru Toudai Eigo Juku is one of the more notable titles of it's kind, and while I personally do not need to learn English, I was still curious to know how this game plays out.
