[IMP] base: no fallback on _lang_get_id
[IMP] base: no fallback on _lang_get_id

It was very misleading that
    self.env['res.lang']._lang_get('fr_FR')
used to return any language if fr_FR was not active or did not exited

There is a very frequent need to get a language from the code
There is rarely a need to get any language
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo