Odoo now loads all supported languages into new databases but only activates the languages requested during setup, so a French database can run with French active while English remains available but disabled. This makes language setup cleaner for single-language businesses and hides translation controls when they are not needed.

Load all languages into the database from a CSV file.
Languages are inactive by default, only the "installed" languages are active.
Activate only the requested language(s).

Installing a database in French will result in:
- only the French language is active,
- the English language is present but inactive.

Do not show the translation icon when only one language is installed.

The marketing tracking module was updated to use Odoo's newer internal framework. This keeps the module easier to maintain and helps ensure continued compatibility without changing the visible business workflow.

https://www.odoo.com/web#id=13383&view_type=form&model=project.task&action=327