pub fn keep_first_once(
config_path: &Path,
marker: &Path,
) -> Result<bool, String>Expand description
keep_first, once on each device: at the first start of a Sioul with these
words. A configuration from before keeps its French, English and France;
one made afterwards (a new person’s, by this Sioul) is left to its
interface’s language and English (languages). marker says it was done.