According to experts, there are a variety of benefits in being able to speak 二ヶ国語 (nikakokugo, in two languages). Or, in other words, in being バイリンガル (bairingaru, bilingual).

Bilingual children tend to have improved . Other studies have found , and even .

And while there are approximately — 43% of the world’s population — 日本は概ね単一言語の国だ (Nihon wa ōmune tanitsugengo no kuni da, Japan is by and large a monolingual nation).