Problems with unicodes

[Krackmou]

Hey !
I'm a French programmer using Colemak-DH and trying to create a second layer (with caps as the switch) to use French accents easily.

I tried to implement this like:

(defalias
acc-hold (layer-while-held accents)
escmod (tap-hold 100 200 esc @acc-hold)
)

(deflayer base
grv 1 2 3 4 5 6 7 8 9 0 - = bspc home
tab q w f p b j l u y ; [ ] ret pgup
@escmod a r s t g m n e i o ' pgdn
lshift x c d v z k h , . / rshift up end
lctrl lmeta lalt spc ralt rctrl left down right
)

(deflayer accents
grv 1 2 3 4 5 6 7 8 9 0 - = bspc home
tab (unicode â) w f p b j (unicode ê) (unicode ù) (unicode î) ; [ ] ret pgup
esc (unicode à) r s t g (unicode è) (unicode é) (unicode ï) (unicode ô) ' enter pgdn
lshift x (unicode ç) d v z k h , . / rshift up end
lctrl lmeta lalt spc ralt rctrl left down right
)

But when I hold caps + a I get this abomination:
^Lf0 instead of à

Same for every accent, I get very unusual text.

Did I make a mistake with unicode ? I'm pretty new to this sorry...