WowAce

 Depending on mining skill level, there are two different skill names in Ru: "Горное дело" and "Добывание". You can check this at http://ru.wowhead.com/spell=74517/mining

Seems that you only check the low-level one in Collector:SpellStarted().
So, here's a quick little fix. 

Collector.lua:

local miningSpell = (GetSpellInfo(195122))
local miningSpell2 = (GetSpellInfo(2575))

...

local spells = { -- spellname to "database name"
	[miningSpell] = "Mining",
	[miningSpell2] = "Mining",
	[herbSpell] = "Herb Gathering",
	[fishSpell] = "Fishing",
	[gasSpell] = "Extract Gas",
	[openSpell] = "Treasure",
	[openNoTextSpell] = "Treasure",
	[pickSpell] = "Treasure",
	[archSpell] = "Archaeology",
	[sandStormSpell] = "Treasure",
	[loggingSpell] = "Logging",
}

So far I've only checked it on a few copper (lvl 20 character, mining skill 1) and leystone nodes (lvl 110, mining skill 255) - seems ok.
Also, there's a reference to miningSpell in Collector:UIError, but I don't know much about programming, so I'll leave fixing it to you guys =)

I'm having the same issue with archaeology -- no minimap icons for nodes.

Added the second alternative mining spell.