Configs

# in application.rb 
config.i18n.load_path += Dir["#{Rails.root.to_s}/config/locales/**/*.{rb,yml}"]

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# i18n-tasks finds and manages missing and unused translations https://github.com/glebm/i18n-tasks

base_locale: fr
# locales: [en, fr ]

# Read and write locale data
data:
  ## by default, translation data are read from the file system, or you can provide a custom data adapter
  # adapter: I18n::Tasks::Data::FileSystem

  # Locale files to read from
  read:
    - config/locales/**/*.yml
    # - config/locales/*.%{locale}.yml
    # - config/locales/**/*.%{locale}.yml

  # key => file routes, matched top to bottom
  write:
    - config/locales/**/*.yml
    # `i18n-tasks normalize -p` will force move the keys according to these rules

  # YAML / JSON serializer options, passed to load / dump / parse / serialize
  yaml:
    write:
      # do not wrap lines at 80 characters
      line_width: -1
  json:
    write:
      # pretty print JSON
      indent: '  '
      space: ' '
      object_nl: "\n"
      array_nl: "\n"

# Find translate calls
search:
  ## Default scanner finds t() and I18n.t() calls
  # scanner: I18n::Tasks::Scanners::PatternWithScopeScanner

  ## Paths to search in, passed to File.find
  paths:
    - app/

  ## Root for resolving relative keys (default)
  # relative_roots:
  #   - app/views

  ## File.fnmatch patterns to exclude from search (default)
  # exclude: ["*.jpg", "*.png", "*.gif", "*.svg", "*.ico", "*.eot", "*.ttf", "*.woff", "*.pdf"]

  ## Or, File.fnmatch patterns to include
  # include: ["*.rb", "*.html.slim"]

## Consider these keys not missing
ignore_missing:
- 'errors.messages.{accepted,blank,invalid,too_short,too_long}'
- '{devise,simple_form}.*'
- 'views.pagination.*'

## Consider these keys used
ignore_unused:
- 'activerecord.*'
- 'activemodel.*'
- 'errors.*'
- '{devise,kaminari,will_paginate}.*'
- 'simple_form.{yes,no}'
- 'simple_form.{placeholders,hints,labels}.*'
- 'simple_form.{error_notification,required}.:'
- 'time.*'

## Exclude these keys from `i18n-tasks eq-base' report
# ignore_eq_base:
#   all:
#     - common.ok
#   fr,es:
#     - common.brand

## Exclude these keys from all of the reports
ignore:
 - kaminari.*

Screenshots.md

Thanks, but I really don't have enough time to deal with this. If you put a demo project on Github where I can run the commands directly, I can resolve this quickly.