Example i18n file using an organization structure I've found very useful

en.yaml

# This is an internationalization (i18n) organization structure I've developed
# and have used in multiple projects.
#
# A key aspect is the use of groups to categorize keys by use case. This
# keeps things organized and easy to maintain since everything has a place. It 
# also helps maintain a nesting depth no deeper than 3 (eg: "pages.home.title").
#
# Available groups:
#   meta, nav, models, actions, messages, forms, components, pages, enums

# META
# Branding and site meta data goes here
meta:
	title: SiteTitle

# NAVIGATION
# top level site navigation
nav:
  home: Home
  music: Music
  search: Search
  login: Login
  logout: Logout

# MODELS
# used in combination with "<action>Model" keys
# intended to dry up "create item", "create other", etc.
models:
  item: item
  items: items
  user: user
  users: users
  plan: plan
  plans: plans

# ACTIONS
# used for buttons, links and menu items
# note that "<action>Model" keys should be used with models keys
actions:
  login: Sign In
  logout: Sign Out
  create: Create {{model}}
  delete: Delete

# MESSAGES
# used for prompts, alerts and errors
messages:
  noModel: There are currently no {{model}}
  confirmDelete: Are you sure you want to delete this {{model}}?
  userNotFound: User not found
  invalidCredentials: Invalid email or password

# FORMS
# form labels should have no suffix (eg: "email")
# placeholders should have "<field>Placeholder" suffix
# help text should have "<field>Help" suffix
forms:
  login:
    email: Email
    emailPlaceholder: Email
    password: Password
    passwordPlaceholder: Password
  search:
    term: Search

# COMPONENTS
# component-specific copy only
# make sure keys that belong in actions or messages do not go here!
components:
  loading:
    message: Loading...
  lane:
    instruction: Press right for next item. Press down for next category.
  dialog:
    title: Alert

# PAGES
# page-specific headings and copy only
# make sure keys that belong in actions or messages do not go here!
pages:
  home:
    title: Home
    message: This message means i18n is working
    instruction: Press down for content.
  login:
    title: Sign In
  logout:
    title: Sign Out
  notFound:
    title: Page Not Found
    message: The page you are looking for does not exist.

# ENUMS
# enums and other data structures
enums:
	activityStatus:
	  pending: Pending
	  active: Active
	  inactive: Inactive
	currencies:
	  usd: USD
	  cad: CAD
	frequencies:
	  month: Month
	  year: Year
	plans:
	  premium: Premium
	  plus: Plus