Let me help you a bit Leo. I have plenty of translation experience and I studied Mandarin so I may be able to break down what Niceboat said.
"Want to say too much, but I do not know from where to start."
This one is pretty easy, he has much to say but dont know where to start.
"Many pertinent ideas of Chinese guys fail to convey to you for various reasons(e.g. language barrier, like myself - -!), although that CIV4 society is thrive and very excited about this mod. Some suggestions are adviced by guys there."
They have some kind of community somewhere and they want to give feedback.
"So consider me bluntly, could you please seriously consider some Soul-breathing's suggestions ?(maybe a bit selfish?)"
I am not sure absolutely what he meant here but it makes most of sense if Soul-breathing is a name, so he does say revolutionary suggestions.
"Soul-breathing roughly chose a few and translate(express my heartfelt thanks),therefore,he somewhile represents the opinions of mang persons.And these guys are not bad in my opinion.(most can complete a part of cultures on emperor.)"
There are many experienced players so one person "Soul-breathing" collected them together.
"In fact they whine a lot about the recent version such as "Does Leo have the skills to complete the new third Maya goal on the king difficulty...What? Keeping all cities in historical area leads to collapse! This works?...."
It is about new Maya UHV goal. I corrected few mistakes to make more sense. I guess king difficulty refers to emperor level. Rest is about city placement.
"Russia is so powerful in the early, Lenin knew?......"
Russia is powerfull at start.
"Suggestions accounted for a large proportion might blame to that their level is not good enough." (eh, don't hit me please~ lol)

"
Not all players are good in their community so ignore unneccessarry complaining.