whatever you all do, the best way is to take the short_name for the specified language, i.e.: fr, en, nl, de, it, etc... and assign the same to a global value.
make a picker view to pop up like a drop down menu (combination of a button on click of which a picker view appears from below with a list of languages) and select the language you desire. let the short name be stored internally. make a .h + .m file named LocalisedString.
Set the global value of short_name to be equal to the obtained value in LocalisedString.m When the required language is selected assign the NSBundlePath to create project sub-directories for the needed language. for eg, nl.proj, en.proj.
When the particular proj folder is selected call the localised string for the respective language and change the language dynamically.
no rules broken.