The strange skull / 3 features that would be great / any advice for the demon child ?/ french translation

[Krux]

Hey so I have many subjects to talk about. If you can help on one of them that would be awesome :p

The strange skull - First of all, there is an achievment about a strange skull to find, I actually loot all the map in my first playthrough but didn't get this achievment and don't seem to find it in my second. I looked at the discussions and nobody talks about it, am I really dumb ?

3 features - Coming from cs:go the slowest sensitivity makes the game too fast without scoping and way way way too slow while scoping, now I'm used to it but would be cool to have 2 sensitivities settings, free look and scoped.
I also noticed there is a button to put a crucifix but you have to go into the inventory to put a totem, maybe it's on purpose but just pointing it out.
Also, there is a perk to increase your sneak ability, making you as sneaky while crouching than standing, really cool perk to avoid threats using your sound but after you unlock that perk there is actually no benefit what so ever to crouch to be sneaky, I think there should still be something like a 10% sneak difference between standing and crouching with the perk, so there is a slight bonus for crouching.

The demon child - the first phase of the last boss (fast as hell and only melee) is quite strange for me, in my first playthrough I killed him by 1 shot him with like 10 crucifix but don't know how to manage to kill him without any crucifix for the achievment atheist, he rekts me really bad if I try to take him down with the guns, is there something I missed about the boss behaviour ?

Finally, the french translations, there are some errors in the french translation, everything is understandable, but some words are missing like one letter, or some words are still in english. 2 exemples :
the perk making you roar if a monster hit you says you will make a "cri de montre" instead of "cri de monstre" not much, but a "cri de montre" is literally a "shout of watch".
It also says that "one ne peut pas blesser les chuchoteurs" instead of "on ne peut pas blesser les chuchoteurs" for the hint on the fact that whisperers are invincible.
Like I said it's not much but I can help by correcting the mistakes if needed.

In any case, the game was AWESOME, didn't think I would dive 100% into it like that. Definitely a gem :D

Thanks for reading, sorry if I did some english mistakes :/ hope I can get some help tho :p

[Krux]

For the first phase of the final boss it's ok now, seems like I missed my shots the last time. It's just like the first boss with 5x speed and no visibility. Just patience looking for it without totem and stress because there is no visibility and you MUST land your first shot then try with the gun a second shot while he is escaping and do it again, will be long but that will do

[Gua]

Thanks for the feedback. Please send me letter to [e-mail] and we will continue conversation regarding French translation improvements.