他不会讲这种外国话。

He doesn't speak the lingo.

他怕失去尊严，因此不愿说外国话。

He's afraid of losing dignity and won't speak a foreign language.

在一片日语声中听到一些外国话的大杂烩，是很寻常的事，最近普通话的声音有不断增长之势。

While it's common to hear a mishmash of foreign languages among the Japanese voices, Mandarin has lately become a growing part of the mix.