Instructions for changing the language on Firefly devices

Firefly S90 Firefly S90
Firefly V65 Firefly V65
Firefly Vision 4 Firefly Vision 4
Firefly Vision 5X Firefly Vision 5X
Firefly Z2 Firefly Z2
Firefly Intense Power Firefly Intense Power
Firefly Intense Mini Firefly Intense Mini
Firefly Intense Desire Firefly Intense Desire
Firefly A6 Firefly A6
Firefly GT50 L Firefly GT50 L
Firefly AURII Secret XR Firefly AURII Secret XR
Firefly Aurii Secret Lite Firefly Aurii Secret Lite
Firefly Aurii Passion Firefly Aurii Passion
Firefly AURII Intense Metal 4G Firefly AURII Intense Metal 4G
Firefly AURII Inspire Firefly AURII Inspire
Firefly AURII Force Plus Firefly AURII Force Plus
Firefly Aurii Fierce Firefly Aurii Fierce
Firefly AURII Fame Firefly AURII Fame
Firefly AURII Amuse 4G Firefly AURII Amuse 4G
Firefly AURII Amuse 3G Firefly AURII Amuse 3G