I set title display language is English. but ...

@Col_Needham​ Thank you for yor answer.

The titles of these movies seem to be in Korean.
https://www.imdb.com/title/tt3581920/?ref_=hm_wls_tt_t_1
Succession (TV Series 2018–2023) - IMDb
https://www.imdb.com/title/tt7335184/?ref_=nv_sr_srsg_0

@DOYOON​ Thanks.  This is strange.  It is possible that one of the steps on https://help.imdb.com/article/imdb/common-issues/why-is-imdb-displaying-differently-on-my-browser/GF2ZAR69V859XLHF will help here.

Please can you upload a screen-grab of https://www.imdb.com/preferences/general if the above does not help. 

No problem on PC. It's probably a cache issue with my browser.

However, on the iPhone, it appears in Korean as shown in the screenshot in the link below.

https://1drv.ms/f/s!AvV5P9sbDDUugdRRkNn3iYkOfAzzMQ

@DOYOON​ Good to hear that the site itself is now fine.  Please check the settings in your iPhone app by taping the “You” tab in the lower right of any page, then tap the settings icon in the upper right and select “Display” from the menu.  You should set the “Region” menu to United States (optionally you can set the “App Language” to English too, but it is the “Region” setting which controls the title display):

If you prefer to see the original titles in the country of origin you can leave Region / App Language on South Korea / Korean and instead enable “Show titles in original language” on the same page. 

Hope this helps. 

@Col_Needham​ Thank you for your help. It works! ^^