server-backend/base_default_lang_translate/views/res_lang_views.xml

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

        <record id="res_lang_default_form" model="ir.ui.view">
          <field name="name">res.lang.default.form</field>
            <field name="model">res.lang</field>
            <field name="inherit_id" ref="base.res_lang_form" />
            <field name="arch" type="xml">
                <field name="translatable" position="after">
                    <field name="is_default_lang" />
                </field>
            </field>
       </record>

       <record id="res_lang_default_tree" model="ir.ui.view">
         <field name="name">res.lang.default.tree</field>
           <field name="model">res.lang</field>
           <field name="inherit_id" ref="base.res_lang_tree" />
           <field name="arch" type="xml">
               <field name="translatable" position="after">
                   <field name="is_default_lang" />
               </field>
           </field>
      </record>

    </data>
</odoo>