Some more i18n love

Something we need to establish:

If someone adds a new translation, s/he should put the untranslated pieces into each i18n file... If someone speaking said language whants to translate something he just has to look for matching "xyz": "xyz" ... Or maybe one could create a separate area on each translation file on the bottom saying "todo" in a comment like:
"asdf": "translated asdf"
"asdf2": "translated asdf2"

# todo
"untranslated asdf": "untranslated asdf"

Or something similar :)