Currently, it seems the only way to change the language on the mobile app is to do from Web, and then it applies the language change to the app.
However, we have students (elementary and middle school) who only have access at school via iPads. There is no way to know if they have a computer, and therefore, web access at home. Yes, I suppose they can access via Safari on their iPds.
Our parents, are limited to access to Canvas via the parent app. Because of our single sign-on, parents do not have accounts for our regular web access. The only way parents could change the userface language is if the Parent App had the ability to change language from the App settings.