Domain values are language dependent (see value table &1 in DDIC)

What causes this issue?

The current data object is bound to a data element in the ABAP
Dictionary (DDIC). The system has determined that the bound data element
is associated with value table &v1&. This table contains values that are
language-dependent.
Note: This is not an error, but it can lead to unwanted effects and even
to errors in dependent objects. For example, a value entered for the
data object in one language may not be available when you are logged on
to the system in a different language. This could result in value check
errors.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

To avoid any unwanted effects, we recommend using a value table with a
key field that is language-independent. If this is not feasible, you
have to be extra careful when using the current data object in your
rules. Here, it might be necessary that you implement language-specific
distinctions for the rule execution.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.