1.1.0 just posted has Family Fighter support. I've not had a chance to get to Argus on the PTR so it's not thoroughly tested (as you can see by my progress below!):
It's also "future proofed" so adding future achievement tabs is a simple matter of plugging in achievementIDs and npcIDs (unless they do something weird like name criteria differently than the npcs, npcs become untargetable like challenge posts, etc).
The npc names and tab names are localized by grabbing their text from the achievements. I may widen the window a tiny bit for Corrupted Blood of Argus. But if lots of stuff is truncated in other languages, let me know and I may do a smaller font (or an option for a smaller font).
Also note on the PTR, at least for me, credit for the 10 Family Familiar sub-achievements did copy over, but the individual criteria did not copy over. Which leads to a weird situation where there's green checks across the bottom of the window but no pet types are lit up. This is an issue with the PTR and nothing that can be fixed. (Before it would put a 0 there because it was counting the total pet types done and doing a check if it was 12+; since the number of pet types needed to beat changes now, it ignores the total and puts a check if the achievement is complete--or it should!)
Let me know if it's not working as expected. I'll try to get some free time this week to unlock Argus and stuff on the PTR.