If you run into issues, feel free to open them on Transifex, or detail them here in this topic or in a new topic. It would be good to start a French speaking sub-community if there are enough interested people.
all i need is in the doc https://docs.transifex.com/getting-started/translators and https://docs.transifex.com/teams/understanding-user-roles
no information about department !
but it's ok