Is there a way to localise error messages in Craft Commerce 2?

Question

I'm using Craft Commerce v2 on a Craft 3 Pro website.

The checkout process of the shop includes a number of forms such as the ones that visitor can use to add or edit shopping and billing addresses. All the templates are based on the demo templates for Craft Commerce and I haven't created any of those input fields using Settings > Fields.

When an error occurs in one of those forms, an error message is displayed as expected under each input field. However, the error messages are not fully localized. For example, if a field is required and the form is submitted without a value for that field, then the error message appears localised except for the title of the required field.

In this error message: The field "First Name" must not be empty.

the name of the field, First Name, is not localized.

e.g. Το «First Name» δεν μπορεί να είναι κενό.

How can I localize the «First Name» part?

Answer 1

User accounts’ First Name field isn’t required, so I’m guessing this is a custom field?

You can translate your custom field names using static message translations.

Create a new file at translations/<Language>/site.php:

my-project.test/
├── config/
├── ...
└── translations/
    └── <Language>/
        └── site.php

(replace <Language> with your language ID, e.g. el.)

Then have it return an array that translates your custom field names.

<?php

return [
    'First Name' => 'Ονομα',
];