I noticed that after updating my RUT955 from 00.06.07.1 to 00.06.08.5, my SNMP package was uninstall and I have to re-install it manually (because my RUT aren't connected to Internet).
After updating firmware, in Package Manager, the SNMP package (and now "French language set") are "In queue to download".
I can reproduce this issue.
Could you also provide the "French language set" paquet to download ? and the laste SNMP version (i used tlt_custom_pkg_snmpd_5.8_ar71xx.ipk)