to invoke. All the remaining arguments and options after
.B ---
are passed to the virtualisation server program.
+.TP
+.BI --set-lang= langval
+When running commands on the testbed, sets the \fBLANG\fR environment
+variable to \fIlangval\fR. The default in \fBadt-run\fR is to set it
+to \fBC\fR.
+.TP
+.BI --leave-lang
+Suppresses the setting by \fBadt-run\fR of \fBLANG\fR on the testbed.
+This results in tests and builds using the testbed's own normal
+\fBLANG\fR value setting.
.SH OUTPUT FORMAT
During a normal test run, one line is printed for each test. This