Yes that's exactly what i was saying ;)
There is a way but i did not really tested it or let's say i didn't finished this new game yet and GTA-V it's not helping ;) But so far i didn't had much trouble.
To make it works quickly, i used: "Egg Translator" (with custom database available on their website) ,i think "Fallout 3 Localizator" would works too and a Steam copy of both games.
Install TTW 2.0+ with both games in English, make sure everything it's ok and use Egg Translator to "quick translating" all the needed plugins. I won't be perfect and especially for TTW's assets but it's good enough to play the game. Not really complicated, you just need some time to finish it well, if you want it to...
**For the french database of Egg Translator there a lot of missing strings in Zeta.esm but it wouldn't be complicated to complete it, i just not looked for it yet... (translating is cool but playing is better!)
Once all of the plugins are translate, check the load order and start a new game (with no other mod, of course!) to make sure there not a broken plugin. Sometimes, Egg Translator or a bad move with it could kill a plugin... At this point, you should be able to play the game with all the English voices which is fine to me!
If you really want to play it with the French audio, then extract your French audio files like the FAQ's say. But TTW 2.0+ rename and reorganize some of those files, so you will have to check every files that you can't ear "in-game" and replace it by hand... It could take a long, long, long, long time... I would say that 30% of the French's voices are still working, but i give up with this since i like to play with the English audio.
You can use a French copy of FNV, it doesn't matter for the patcher but you absolutely need an English copy of Fallout 3. The reason i use an English copy of FNV it's to avoid trouble. Because French and English copy may not be exactly the same and it may be a problem at some point to play TTW 2.0+.
Sorry if i used a bad English, please tell me if i misspelled anything which is probably the case... ;)
Video games are bad for you? That's what they said about rock'n'roll...