Answer
Yes, this is possible, using the Translation window/screen to add the translated text for a specific language. However, simply adding the translation entry there isn't sufficient on its own — the translated text also needs to be exported, then built and packaged, and finally installed as a proper IFS delivery before it actually takes effect in the running client, since this specific kind of client UI text lives in compiled client resources rather than a live database table the way most other IFS translations do. For most customers without their own development capability, this specific kind of client-text translation typically needs to be requested from IFS or an implementation partner as a support/development ticket, rather than done independently as a live configuration change.