I think he can simply create 2 categories, and install the Turkish translation (I do not know where or if it's available, I hope it is).
.- English (category)
|-- Pre-Sale Questions
|-- Products Support
|-- Off-topic discussions
|-Turkish (category)
|-- Pre-Sale Questions
|-- Products Support
'-- Off-topic discussions
If he wants the same content viewable in more languages, he can also install
a mod like this.