Using the `_html` suffix in an i18n key is the same as using `html_safe`
on it, which means that translation could potentially be used for XSS
attacks.
We understand languages management as the ability to add new languages
or remove existing ones. When no option is passed it will allow language
manipulation by default.
There are 3 special places where we want block languages management:
- admin legislation processes homepage
- admin legislation processes milestones summary
- proposals retired form
Co-Authored-By: Sebastia <sebastia.roig@gmail.com>