Hi - Rich from the Markets product team here. This is a known limitation that is being fixed. The reason for it happening is the clash with the markets subfolder format: example.com/{language ISO code}-{country ISO code}/ but we are looking at a solution - accelerated by your feedback, so thank you.
Thanks @richbrown_staff . Actually I can add Traditional AND Simplified Chinese on Market- China. However, I cannot add Traditional AND Simplified Chinese on Hong Kong SAR where is my primary market. May I know is this included in the coming fix?
Pleased to say this has been rolled out to 100% today. Add the Chinese that you don’t currently have, and you’ll then be able to add both to a market using the new URL structure.