I've been studying french for some time and I decided to look for a french client or a patch, so that I can learn some new things even while playing.
I found http://forum.warmane.com/showthread.php?t=388077 from 2 years ago.

It works really well! Pretty much everything, except tooltips, is in French now. For example, if I hover over a spell, it will display the range, cost, and what kind of attack it is, but not the name, effect or description. (screenshot: https://imgur.com/CCLzA7z)

Tooltips don't wokr for: spells in my spellbook, spells on my action bars, buffs, consumables (potions, food, poisons, etc.)

I am also using updated models + updated tilesets, but I don't think these two would inferfere with a language pack.

Is there any way to fix this?
Tweak my config, or something like that?
Perhaps if anyone knows of a better source of a french patch / client?