How To Fix TR198 - Field "Language" is not specified with '*' or '/L'

SAP Error Message - Details

• Message type: E = Error

• Message class: TR - Change and Transport System

• Message number: 198

• Message text: Field "Language" is not specified with '*' or '/L'

What causes this issue?

A character other than the replacement character
"/L" for a single language
"*" for all languages
was entered in the key description for a field of table "&V1&"
with type "language".
The key description is: "&V2&".
This error can also occur when the length of the object name is
changed, causing characters to shift.

System Response

A warning is generated.

How to fix this error?

Check the key description and, if necessary, enter the replacement
character "/L" or "*" in the field of the type "language".

Error message extract from SAP system. Copyright SAP SE.