Custom Field Translation

Hello everyone,

I'm trying to create a classifieds site with osclass. Everything's fine, but I created some custom fields. How can I translate them into different languages? I tried adding the translation to the theme's language files, but they aren't translated.
How do I translate custom field labels?

Osclass custom fields cannot be translated, it's their drawback.
Maybe... maybe it is possible to do like:
<?php echo __($custom_field_value, 'epsilon'); ?>
In theme and then manually add all possible combinations of $custom_field_value to .po file and translate it, then theoretically you might be able to translate it   ... without manual entries to .po file, it is not possible to recognize these values.

Never tested, just idea.

Alternatively - use plugin that supports it, like https://osclasspoint.com/osclass-plugins/attributes-fields-maps/attributes-osclass-plugin-i77

But are these the files to edit?

item-edit.php
item-post.php

Or are there other ones?

No, item.php where you show values.