Allow users to define their preferred language, and display it on their profile resume
When opening a conversation with a colleague you dont know in a worldwide company, it isnt possible to know what is their prefered language. As a result, all conversations start with so you prefer that language or that language ?
If preferred language gets added in users' profiles, and gets displayed when openint an empty private conversation, talking to colleagues you dont know will become less awkward
Check out this plugin:
It allows allows you to add custom attributes to users.