[jacalata]

Your pros and cons for option 1 are wrong. You don't incur the long term cost of translating all strings just by making your software localizable - you incur it by releasing localized software. (Same for making it accessible to the larger market). It should say something like "pro: reduces future cost of deciding to release in other languages. Con: may be extra work". And how big a con that is depends a ton on what technologies you're using and whether your current plan is to just hardcore strings everywhere.