They've shown us English so far because that's what they have it for. Menus are both the easiest and the most critical. It's the big walls of text like trophy descriptions they're probably hammering out now.I agree that that might be true for the PAL release. But American? They only need English. And check it out, all the screens we've seen have english text.
And what about voice actors? How many pokéballs were available in the demos? More in the Japanese demos, right?
I'm not saying that when the Japanese game is 100% done the English version is 0% done. We've seen plenty of English. I'm saying that it's probably about 50-60% translated and there's still a lot of content that needs to be localized, and it's taking longer than expected.