spécialité

/spe.sja.li.te/
1.
nounfeminineSing

local food specialty

signature dish / house specialty

La spécialité de la maison, c'est le confit de canard.

The house specialty is confit de canard.

2.
nounfeminineSing

area of expertise

specialty (field of study or professional focus); also an academic major

La micro-informatique, ce n'est pas sa spécialité.

Microcomputing isn't really his area of expertise.