Alert Composer - Translation Editor not working

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Experts,

Have you used Translation editor in Alert Composer successfully  ?

We have create few alerts and they are working fine with English. We added added different translation using translation editor ( screenshot attached)

Requirement is based on user preferred language ( setup) He/ She should receive alert notification in their language.

It is not working. It always sends only English. we are in 20B ( it never worked in 20 A also)

Anyone successfully used translation editor for Alerts, please let me know. Any help appreciated.

Thank you.