I don't know localizer.module. I know a little of i18N.module, it works mainly with the t() function for strings, and has it's own implementation for translating blocks, taxonomy and other stuff. The important part is linking translated stuff together (so blockX is known as translation from blockY f.e.).

I don't really understand what you mean by "stored variables". I think as long it's not t() parsed, it's never gonna be translated, but I'm not 100% sure.

I think this is a quit important issue though, thanks for giving it attention.

Regards,

Kees