You don't need any special rights to edit the wiki stuff.
Back in June, I listed the remaining pages needing translation to English:
https://listarchives.tdf.io/i/kQK3S0AM6KuQViycHyueq4la
Some of these might already be translated after I sent my message.
As a particular note, I'm not sure if the Advisories article should be translated or deleted, because we have a page about security advisories on the libreoffice.org website.
I updated the French contents earlier to match updates in the user interface (except for screenshots).
The way it would go with the translation is that you:
1. Create the English page while removing the /fr suffix, like https://wiki.documentfoundation.org/Faq/Base/020
2. While adding the English paragraphs, make the structure correspond to the French text, so it will be easier to migrate the French over as translated strings later
3. While still editing the English page, finalise it by adding <translate> elements as described in https://wiki.documentfoundation.org/TDF_Wiki/Multilingual#Content_with_global_focus
4. After saving the English page, mark the page for translation and wait 5-10 minutes for the wiki jobs to be run
5. Follow these instructions to migrate the French content into the new translation system: https://wiki.documentfoundation.org/TDF_Wiki/Multilingual#Migrating_old_translated_content_to_the_current_system
If needed, I can help via a call with screensharing.
Ilmari