This pop up may appear as soon as you open the app, asking you to select a Chrome app language. The default selection simply inherits this setting from the system but now you will be able to pick a different option.
If you will navigate to the Language settings, you will be able to change it there too. This option is displayed on top of the content language list. On the same page, you can also customize translation settings a bit more by selecting to which language to translate by default.
Spotted on Canary 95.0.4619.0 for Android.