HiHi - Here is what we did for my application (we just got AOR2 a couple of days ago)
Since they asked for no more than 10 pages, we broke our chats like this:
1) First five pages with Whatsapp Chat, there was no translation done. Most of our chat was in Hindi (and English in between). We put the chat in a way that chats were from different weeks and months to show that we were in continuous touch with each other.
2) The next 2-3 pages were for the video chat logs from Skype or any other media you used.
3) The next 2-3 pages were for the Audio call records we did through FB messenger and Rebtel.
Because they are asking for a maximum of 10 pages, you shall do your best to put it in a way that shows that you were in constant touch most of the time, so include snippets as to show some data from every week or month.
I don't think they care if you translate your chats or not because they want to see there was enough interaction between the two of you. Again, this is just my opinion and may differ from others.
My whatapp chat history is same as of yours. means, in both language. whether they raised any objection for that ?