Launch app with Double-Length Pseudolanguage

[Phyber64]

Is your feature request related to a problem? Please describe. I am unable to select Double-Length Pseudolanguage from the Locales in RocketSim.

Describe the solution you'd like Add the option to relaunch the app in Double-Length Pseudolanguage.

Describe alternatives you've considered Setting the Double-Length Pseudolanguage language option in Xcode scheme.

Additional context N/A

[AvdLee]

Great idea, added it to the backlog! Should be doable by allowing -AppleLanguages (en-Doubled)