Not exactly. I got (and renewed) the Swiss permit with zero knowledge of any official language. However, my wife had to present the basic certificate or my promise that she would learn the language.
Japan also tends to leave many contextual and obvious things unstated, and relies on group concensus and information exchange between in group peers over top down authority, so may consider the ultimate group concensus, language, not needing to be codified.
Although i do wonder what my son's 国語 text books teach if Japanese is not the official 国語.
