Best answer by Max
The Bands in general have a default language based on the region they are destined for and they have a selection of languages that they support that can be changed by the default language on the phone.
At the present time any language not supported by the device will make it switch to its default based on the region it was destined for.
Perhaps in future developments it will be possible to change language packs but on the current version this is not the case. We apologize for the inconvenience and thank you for your feedback's.