The label_encodings(4) file contains locale-sensitive information. However, not all system programs that use the file are guaranteed to be locale-aware.
Workaround: In multi-byte locales or non-C locales where upper/lower case are not a direct mapping of the C locale, the classification and word names, short names, alternate names in the label_encodings file and all string labels in all databases must be in upper case only. Also, all labels must be entered in upper case only:
On the command line where the locale has not been set, or
To commands which do not call the library function setlocale(3C) with the correct locale.