Well, let me put it this way - when I go to a game, Nutaku games included, the first thing I look at is what it's about. The setting, the story, etc. Context means a lot to me. Especially when it comes to sex scenes, and without the words it's just a picture for me (and from what I can tell from games like Dragon Tactics: Memories and Girls Kingdom, I only rarely like the voices in such scenes).
That being said, as long as translations exist and can be found, I'm willing to put in the effort. I mean, I'm unlikely to play a game only on DMM if I like it that much, so I should be able to avoid situations like, "What does this button do?"