How to set device language in play mode (for debugging)?

Hi there guys!

We are testing some language loading features based on the language of the device (with Application.systemLanguage) and we were wondering if it is possible to change the device language on play mode so we can test the features on the pc without having to generate a build and test on the actual device (it would take forever).
So far, we change the language on the corresponding variables after callig Application.systemLanguage while debugging, but right now we need to check whether the language of the device is detected correctly. Any ideas?

Thanks in advance!