This is interesting.  Obviously plist supports arrays.  And obviously this will translate into an array in JS.  However, what isn't obvious to me is whether this is a good idea or not, since it means that po file support and plist file support is quite different in i18n-abide.  There's no concept of an array in a po file, so far as I know.  What does it mean for us to add that here?  Why not do this as 4 separate key/string pairs?  cc @Pomax