An example:

• https://maps.wikimedia.org/#7/34.294/134.780

There is a strange linebreak in Korea

The same in Japany - it looks like only related to country names if the space permits. A screenshot to illustrate:

This isn't happening with the new style, but this feels like a case where there could be an obscure Mapnik setting that differs, so I'm not inclined to say it'll be fixed for sure.

In T106285#4448214, @Mholloway wrote:

I think this is within the bounds of convention for those languages.

Writing Korean vertically — that's a concept for pre-1980 era and is effectively dead concept as of 2018.

In T106285#4450834, @revi wrote:

In T106285#4448214, @Mholloway wrote:

I think this is within the bounds of convention for those languages.

Writing Korean vertically — that's a concept for pre-1980 era and is effectively dead concept as of 2018.

Thanks! I stand corrected. :)