strapi-plugin-i18n/admin/src/schemas.js

This plugin enables to create, to read and to update content in different languages, both from the Admin Panel and from the API

import { object, string } from 'yup';

const localeFormSchema = object().shape({
  displayName: string().max(50, 'Settings.locales.modal.locales.displayName.error'),
});

export default localeFormSchema;