lang = env['res.lang'].search([('code', '=', 'tr_TR')])
if not lang:
    installer = env['base.language.install'].create({'lang_ids': [(4, env.ref('base.lang_tr').id)]})
    installer.lang_install()

env['res.lang'].search([('code', '=', 'tr_TR')]).write({'active': True})
env['res.users'].search([]).write({'lang': 'tr_TR'})
env.cr.commit()
print("Language changed successfully!")