Timescale change problems

[Eastside Character]

So the question is , that the game uses the number of turns or the yearnumber to make a historical event, or anything else...

And the answer is yes, the game uses turns for triggering historical events.

AND What do you think about this changes in my game, will it cause an error while I'm playing, or will it make differences in the behavior of the nations, and its improvements, and anything????

I think the change is in plus, but this is my due to personal likes and dislikes. As for any errors caused by the changed turn-year ratio I must say that I changed my game to 1year=2turns and haven't experienced ANY problems/crashes connected with it. Concerning the behavior of AI controlled factions I'm not really sure as in what way your change can make them act differently than in vanilla. I haven't tested it thoroughly but my guess would be that there is no major difference in how the AI acts.

And is it possible to change the timescale in a current campeign, or do you need to start a new one for the changes to occur?

I think you need to start a new campaign.

I have also question about this (dont have M2TW yet).
Is it possible to get 4 turns per year by only changing timescale in M2TW, with correct aging of characters, or do we still need script to do the work?
Thanks.

I suspect it is possible but I havent try this. Theoretically you just need to change the year-turn ratio from 2.0 to 0.25. The characters will however always age 1 year every 2 turns. I don't know if a script will do a trick here as I'm not into scripting.

Cheers
EC