KeePassXC does not use the primary preferred language of macOS and use multiples languages

Expected Behavior

KeePassXC uses only the primary preferred language (English).

Current Behavior

KeePassXC uses a mix of primary and secondary preferred language.

Steps to Reproduce

1. Install KeePassXC
2. Open settings.

Context

macOS 10.14.5
Preferred languagues: English, French, Dutch.

Keeping only English as preferred language makes KeePassXC use only English.

Debug Info

KeePassXC - Version 2.4.2
Revision: a775031

Qt 5.12.3
Debugging mode is disabled.

Operating system: macOS Mojave (10.14)
CPU architecture: x86_64
Kernel: darwin 18.6.0

Enabled extensions:

• Auto-Type
• Intégration aux navigateurs
• Agent SSH
• KeeShare (signed and unsigned sharing)
• YubiKey
• TouchID

Cryptographic libraries:
libgcrypt 1.8.4