You are using the Language Adaptation to change terms in your system but some error messages still show the standard term. The error messages are not available in the Language Adaptation either.
SAP Sales Cloud
Not all message texts can be collected by the Language Adaptation. For performance reason the Language Adaptation only collects messages that are referenced either directly by the UI or indirectly by the one of the Business Object (Nodes) used within the UI.
Certain messages belong to neither of both use cases. And since application developers are not blocked from raising un-referenced messages there's a certain probability of gaps like the present one. Quite often those messages are reference in any other UI's and are found alongside with these.
This is the current system behaviour.
language adaptation, error messages, text, translation, collect text , KBA , AP-RC-TXA , C4C Text Adaptation , Problem