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FEATURE: Localization fallbacks (server-side) #2

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FEATURE: Localization fallbacks (server-side) #2

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2 changes: 2 additions & 0 deletions app/controllers/application_controller.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -155,6 +155,8 @@ def set_locale
else
SiteSetting.default_locale
end

I18n.fallbacks.ensure_loaded!
end

def store_preloaded(key, json)
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5 changes: 0 additions & 5 deletions config/cloud/cloud66/files/production.rb
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Expand Up @@ -23,11 +23,6 @@
# Specifies the header that your server uses for sending files
config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx

# Enable locale fallbacks for I18n (makes lookups for any locale fall back to
# the I18n.default_locale when a translation can not be found)
config.i18n.fallbacks = true


# you may use other configuration here for mail eg: sendgrid

config.action_mailer.delivery_method = :smtp
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4 changes: 0 additions & 4 deletions config/environments/production.rb
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Expand Up @@ -24,10 +24,6 @@

config.log_level = :info

# Enable locale fallbacks for I18n (makes lookups for any locale fall back to
# the I18n.default_locale when a translation can not be found)
config.i18n.fallbacks = true

if GlobalSetting.smtp_address
settings = {
address: GlobalSetting.smtp_address,
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4 changes: 0 additions & 4 deletions config/environments/profile.rb
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Expand Up @@ -27,10 +27,6 @@
# Specifies the header that your server uses for sending files
config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx

# Enable locale fallbacks for I18n (makes lookups for any locale fall back to
# the I18n.default_locale when a translation can not be found)
config.i18n.fallbacks = true

# we recommend you use mailcatcher https://github.com/sj26/mailcatcher
config.action_mailer.smtp_settings = { address: "localhost", port: 1025 }

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24 changes: 24 additions & 0 deletions config/initializers/i18n.rb
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@@ -0,0 +1,24 @@
# order: after 02-freedom_patches.rb

# Include pluralization module
require 'i18n/backend/pluralization'
I18n::Backend::Simple.send(:include, I18n::Backend::Pluralization)

# Include fallbacks module
require 'i18n/backend/fallbacks'
I18n.backend.class.send(:include, I18n::Backend::Fallbacks)

# Configure custom fallback order
class FallbackLocaleList < Hash
def [](locale)
# user locale, site locale, english
# TODO - this can be extended to be per-language for a better user experience
# (e.g. fallback zh_TW to zh_CN / vice versa)
[locale, SiteSetting.default_locale.to_sym, :en].uniq.compact
end

@cursor cursor Bot Feb 12, 2026

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Translation cache stale after site default locale change

Low Severity

The FallbackLocaleList#[] dynamically includes SiteSetting.default_locale in the fallback chain, but the translation LRU cache key in the translate method is "#{key}#{config.locale}#{config.backend.object_id}", which doesn't account for the site default locale. Previously the fallback chain was static ([locale, :en]), so the cache key was sufficient. Now, if a site admin changes the default locale, cached translations resolved through fallback will be stale until the process restarts or the LRU evicts them — there's no I18n.reload! triggered on default_locale changes.

Additional Locations (1)

Fix in Cursor Fix in Web


def ensure_loaded!
self[I18n.locale].each { |l| I18n.ensure_loaded! l }
end
end
I18n.fallbacks = FallbackLocaleList.new
2 changes: 0 additions & 2 deletions config/initializers/pluralization.rb
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5 changes: 5 additions & 0 deletions lib/freedom_patches/translate_accelerator.rb
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Expand Up @@ -59,6 +59,11 @@ def load_locale(locale)
end
end

def ensure_loaded!(locale)
@loaded_locales ||= []
load_locale locale unless @loaded_locales.include?(locale)
end

def translate(key, *args)
load_locale(config.locale) unless @loaded_locales.include?(config.locale)
return translate_no_cache(key, *args) if args.length > 0
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