I know it's a visual novel so there is a lot more text involved than something like Touch and Tease or Sugar Shooter, but are there any plans to do an English translation for Wonderful Pair?
Yes, we're planning to translate the game to English language after all episodes are released in Japanese.
Parts of the reason why is because we're currently short of translators. If we can find more translator in the future, English version of the games will be released sooner.
If I knew any Japanese, I think it would be fun to translate these. As it is, I can only translate broken English into more-correct English. :-[
So far I've just used write in Google translate to scribble in some lines in order to get a vague idea of what some of the options mean.