I checked the .pot files @kip but no Plural-Forms: header.
I think you pinpointed the source of the exception though, as Application.get_env(:gettext, :plural_forms, Gettext.Plural) resolves to the custom module, and the exception occurs when nplurals/1 is called on it. Perhaps there’s something more I need to do for the mix task to be able to access it?
Task such as
mix gettext.mergeuse the plural backend configured under the:gettextapplication, so in general the global configuration approach is preferred.
Because of that, use the global configuration:
# For example, in config/config.exs
config :gettext, :plural_forms, MyApp.Plural
Instead of the configuration for a specific backend module:
defmodule MyApp.Gettext do
use Gettext, otp_app: :my_app, plural_forms: MyApp.Plural
end
Then, the problem should be solved.