It would be nice to have default content consistent with install language choice

[mose]

Type of issue New feature

Description It would be nice to have a default content installed according to chosen language. At the moment we only have french content in setup/sql/default-content.sql I wonder if we could get those useful pages translated at some point and served according to the choice made during the install process,

[J9rem]

duplicate of #684 for English

[seballot]

https://priorites.yeswiki.net/posts/25/possibilite-de-traduire-le-wiki-de-base