The system values of the primary language on the server are used as server-wide cultural and linguistic defaults. Therefore, if you change the primary language on the server, each varying system value resets to the default system value for the new primary language.
The following list shows the cultural and linguistic system values. To display or change these values, use the Work with System Value (WRKSYSVAL) command. A subset of language-dependent default system values (QCCSID, QCHRID, QCNTRYID, QCURSYM, QDATFMT, QDATSEP, QDECFMT, QKBDTYPE, QLANGID, and QTIMSEP) are shown in Default system values in the Reference section.