diff --git a/odoo/addons/base/wizard/base_language_install.py b/odoo/addons/base/wizard/base_language_install.py
index a617b685ae9..3a41302b40d 100644
--- a/odoo/addons/base/wizard/base_language_install.py
+++ b/odoo/addons/base/wizard/base_language_install.py
@@ -25,6 +25,7 @@ class BaseLanguageInstall(models.TransientModel):
     lang = fields.Selection(_get_languages, string='Language', required=True,
                             default=_default_language)
     overwrite = fields.Boolean('Overwrite Existing Terms',
+                               default=True,
                                help="If you check this box, your customized translations will be overwritten and replaced by the official ones.")
     state = fields.Selection([('init', 'init'), ('done', 'done')],
                              string='Status', readonly=True, default='init')
diff --git a/odoo/addons/base/wizard/base_language_install_views.xml b/odoo/addons/base/wizard/base_language_install_views.xml
index 811bac29aad..906cbe41f71 100644
--- a/odoo/addons/base/wizard/base_language_install_views.xml
+++ b/odoo/addons/base/wizard/base_language_install_views.xml
@@ -10,7 +10,7 @@
                     <field name="state" invisible="1"/>
                     <group states="init">
                         <field name="lang"/>
-                        <field name="overwrite"/>
+                        <field name="overwrite" groups="base.group_no_one"/>
                     </group>
                     <group states="done" colspan="4">
                         <span class="o_form_label">The selected language has been successfully installed.