odoo-association-addons/l10n_fr_association/views/res_country.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

  <record id="view_country_form_inherit_base" model="ir.ui.view">
    <field name="name">res.country.view.form.inherit</field>
    <field name="model">res.country</field>
    <field name="inherit_id" ref="base.view_country_form" />
    <field name="priority">30</field>
    <field name="arch" type="xml">
      <field name="state_required" position="after">
        <field name="is_french" groups="base.group_no_one" />
      </field>
    </field>
  </record>

  <record id="res_country_view_search" model="ir.ui.view">
    <field name="name">res.country.view.search</field>
    <field name="model">res.country</field>
    <field name="arch" type="xml">
      <search>
        <filter name="french" string="French" domain="[('is_french', '=', True)]" />
        <filter name="europe" string="Europe" domain="[('country_group_ids', 'in', %(base.europe)d)]" />
        <group name="group_by" expand="0">
          <filter name="by_group" string="Country Group" context="{'group_by': 'country_group_ids'}" />
        </group>
      </search>
    </field>
  </record>

</odoo>