> Of course, imagine a Korean immigrant in the US writing "it was difficult to communicate in Korean".

This is a bit unfair when the company we're talking about goes out of its way to recruit and relocate skilled workers from overseas to Korea, knowing than most will never have the time or motivation to learn the language to a professional level.

And yes, I know that shoving English down the throats of 97% of your employees isn't too cool and doesn't make a lot of sense in some teams, but English proficiency is one of the requirements to get a job there. It'd probably be more efficient to have an English only "global division" with mostly (but not only) foreigners, like Rakuten has in Japan. Fun fact: over the period of a short year, one of the two EVPs of my division wasn't a Korean speaker.