static Bool fs_check_locales(void *__self, const char *locales_parent_path, const char *rel_path, char *relocated_path, char *localized_rel_path)
{
	char path[GF_MAX_PATH];
	const char *opt;

	GF_FSLocales *loc = (GF_FSLocales*)__self;

	/* Checks if the rel_path argument really contains a relative path (no ':', no '/' at the beginning) */
	if (strstr(rel_path, "://") || (rel_path[0]=='/') || strstr(rel_path, ":\\") || !strncmp(rel_path, "\\\\", 2)) {
		return 0;
	}

	/*Checks if the absolute path is really absolute and points to a local file (no http or else) */
	if (!locales_parent_path ||
	        (locales_parent_path && (locales_parent_path[0] != '/') && strstr(locales_parent_path, "://") && strnicmp(locales_parent_path, "file://", 7))) {
		return 0;
	}
	opt = gf_opts_get_key("core", "lang");
	if (opt && (!strcmp(opt, "*") || !strcmp(opt, "un") ) ) {
		opt = NULL;
	}

	while (opt) {
		char lan[100];
		char *sep;
		char *sep_lang = strchr(opt, ';');
		if (sep_lang) sep_lang[0] = 0;

		while (strchr(" \t", opt[0]))
			opt++;

		strcpy(lan, opt);

		if (sep_lang) {
			sep_lang[0] = ';';
			opt = sep_lang+1;
		} else {
			opt = NULL;
		}

		while (1) {
			sep = strstr(lan, "-*");
			if (!sep) break;
			strncpy(sep, sep+2, strlen(sep)-2);
		}

		sprintf(path, "locales/%s/%s", lan, rel_path);
		if (fsess_find_res(loc, (char *) locales_parent_path, (char *) path, relocated_path, localized_rel_path))
			return 1;

		/*recursively remove region (sub)tags*/
		while (1) {
			sep = strrchr(lan, '-');
			if (!sep) break;
			sep[0] = 0;
			sprintf(path, "locales/%s/%s", lan, rel_path);
			if (fsess_find_res(loc, (char *) locales_parent_path, (char *) path, relocated_path, localized_rel_path))
				return 1;
		}
	}

	if (fsess_find_res(loc, (char *) locales_parent_path, (char *) rel_path, relocated_path, localized_rel_path))
		return 1;
	/* if we did not find the localized file, both the relocated and localized strings are NULL */
	strcpy(localized_rel_path, "");
	strcpy(relocated_path, "");
	return 0;
}