[ja] Added translations for edit, save, translations, option_type_placeholder, taxon_placeholder and variant_placeholer

When I uses 2-1-stable, there are some of lack of translations as bugs.
So I added these translation that I recognised.
Updates pt-BR to 2.1-stable

Fixes #346
Add feature spec for permalinks
[es] Add missing translations for promotions + no_resource_found
sync with en, improve translations