QtIF wrong language at app startup

[SebastienB]

Hello,

I developed an application that supports French and English languages depending of user's operating system language.
Everything works fine but when I install my application via an installer (QtIF) if at the end I select "Execute now" as on the attached picture here my application starts in English however it should start in French as my operating system is in French.

Did someone already get this weird case?
Thank you.