[IMP] base,base_setup: Improve general languages settings

Purpose of the task is, We saw that users encounter difficulties
while installing languages so improve the user onboarding experience
when user wants to install a new language.

So in this commit,
 - Change the load langauge wizard title as 'Add Language' and rename
the button as 'Add'
 - Removed documentation link as it is not up to date
 - Added the 'Add language' button to general settings and it will open
the wizard to load the languages. and move the 'manage language' button
to the debug mode.
 - After install added button 'switch to (lang)	& close' to switch to
newly added language.

closes odoo/odoo#53581

Taskid: 2281393
Closes: #53581
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>
Co-authored-by: Nisha Patel <nit@odoo.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/odoo/addons/base/wizard/base_language_install.py b/odoo/addons/base/wizard/base_language_install.py
index 40dd162fbeb..f9f495c56f8 100644
--- a/odoo/addons/base/wizard/base_language_install.py
+++ b/odoo/addons/base/wizard/base_language_install.py
@@ -55,3 +55,10 @@ class BaseLanguageInstall(models.TransientModel):
             'type': 'ir.actions.client',
             'tag': 'reload',
         }
+
+    def switch_lang(self):
+        self.env.user.lang = self.lang
+        return {
+            'type': 'ir.actions.client',
+            'tag': 'reload_context',
+        }