Steps to reproduce:
1. Create a BG company
2. Install the BG Chart of Accounts
3. Install the BG language
4. Switch to the BG language
5. The CoA is not translated
This is due to a missing field in the CoA xml: `spoken_languages` which is now fixed.
Moreover, the language code of Slovenian has been fixed from `si` (which is the country code) to `sl`.
closesodoo/odoo#107353
X-original-commit: ce8f692256714df57864e991e050734b5e04b1f9
Signed-off-by: Laurent Smet <las@odoo.com>