hmm. I was on your site and translation working in normal time (all forum is working in normal time) so I think, you do not have to do anything. CPU is to use it and the CPU load is not too large.
Please note that vBET practically takes no resources for normal pages (only generates flags) so all your additional resource usage comes from additional traffic - traffic to translated pages. More traffic = more resource needed.
I propose not to exclude any flags (translation is working in normal time) because it is not nessesary.
As I wrote before: Now you have 52 times more content and greater site traffic and CPU load must be higher.
Code:
OK, caching is turned on, Ill restrict the items suggested in robots.txt
This will definitely help.
Code:
would a move to 5.x improve health?
I will ask MichaĆ about it.