I checked panels/common/cc-common-language.c and found that all the installed languages (including the two Serbian ones) are passed to the insert_language() function, whose label_own_lang variable is assigned the corresponding label. Hence the GHashTable returned by cc_common_language_get_initial_languages() ought to include it all.
I checked panels/ common/ cc-common- language. c and found that all the installed languages (including the two Serbian ones) are passed to the insert_language() function, whose label_own_lang variable is assigned the corresponding label. Hence the GHashTable returned by cc_common_ language_ get_initial_ languages( ) ought to include it all.