Overview:
A user needs to customize the translation for the standard field dependency help text. However, it is not available in the Translation Workbench.
Root Cause:
The standard field dependency help text cannot be translated unless the user`s language is changed in the user`s personal settings.
Solution:
This is working as designed.
There is no way to hide the icon or to customize the translation using the Translation Workbench when the dependency is defined.
Related Documentation:
Salesforce Help Documentation: N/A