How can I make user profile fields translatable?
I'd like to be able to translate some fields into other languages.
If you are willing to use extra modules, instead of simple t() coding (as I do not believe this is possible for what you desire), install Profile2 and i18n Internationalization modules. Then, follow this guide in Profile translation and its documentation and that should set you straight.
Hope this helps.
If you create user profile with content profile you probably can use CCK translation module for this.