As a good developer (and we all are good eh?) localize your app is a way to give your app some polished professional touch. Also users from other countries that are no native speakers have the chance to use your app a little easier.
But it’s also really hard to keep your code up-to-date with localization. So from time to time, at least for me, i get out of sync with all my localization strings. (Remember, i always use english and german) Maybe for some of you, there is not such a problem, because your development cycle is better for you and you always update your localizations just in time. Anyway, in different forums, there are always the same question and topics; easier localization for us.