[Решено] ACF Select Field Issue

Background of the issue:
I am trying to check the ACF select field translation. The issue can be seen on this page: скрытая ссылка and скрытая ссылка

Symptoms:
I expected to see the facility option show as 'Sand Pool' in English and '沙地' in Chinese. Instead, the facility option shows as 'Sandpool' for both English and Chinese.

Questions:
Why is the ACF select field not showing the correct translation?
How can I fix the translation issue for the ACF select field?