In Japan, you can get by just fine even if you only speak Japanese.
Even if a person doesn't speak any other languages other than Japanese, they can live without any troubles in Japan.
ーIn Japan, you can get by just fine even if you only speak Japanese.
「日本では、日本語しか話せなくても普通にやっていけます」
to get by で「なんとかやっていく」
just fine で「普通に」
ーEven if a person doesn't speak any other language other than Japanese, they can live without any troubles in Japan.
「日本語以外の他の言語を話せなくても、日本では問題なく生活できる」
other than「〜以外の」
can live without any troubles で「何の問題もなく生活できる」
ご参考まで！
カナダ 
