Make an account on Weblate or sign in with your Github or Gitlab ID. Note: Account creation is not required, but you will only be able to suggest translations in this case
Visit the Censorship.no project page - which lists all components and their strings (including Android app strings, the web browser extension, the User Manual and the website).
On the Censorship.no project page's 'Languages' tab, choose the language you want to work on, or -- in case the language doesn't exist yet -- initiate a new language by selecting a component from the main project page and clicking on the "Start a new translation" button.
Please contact the CENO team at cenoers AT equalit DOT ie if you are interested in becoming a reviewer for translation(s) in your language(s).