Hi!
I was cleaning my room and found fallout 2 so i decided to install it.
I'm italian (sry for my bad english btw) so i tryed to install the italian translation.
The matter is that this translation upgrades your game to 1.02 and invalidates my savegames!
I downloaded the 1.0 to 1.02 save converter,i load the savegames in the program and it says v1.01 but when i try to convert my savegames it says "Unknown version of the savegame.Don't know how to handle.".
Now it's not a big problem if i can't play it in italian...
but is it possible to finish the game whitout bugfixes from 1.02 patch?
Pls help me i don't want to start from beginning!
Can't convert save games from v 1.01 to 1.02 (even whit the converter) pls help!
Firstly, Welcome to GameBanshee! 
Secondly, don't worry about your english, it's fine enough. Many of us here has english as second, third or even fourth language, so no worries there. As long as you at least try to use more or less proper english instead of things like "leet language", you are going fine.
And to your problem.
As far as I know, the problem occurs with the fact that the converter was meant to translate 1.00 version saves to 1.02 version. As your saves are 1.01, which is different than 1.00, the converter can't fully understand the saves and the error occurs.
Now, you ask if it's okay to run the game with normal 1.01 patch? I definately say no. Even though the it's possible to beat the game with such version, the list of big bugs is too long to describe and stay sane. And that only includes major bugs, not even close to all those minor bugs and annoyances. So, my suggestion is to upgrade to 1.02, but continue patching to as high as you can find patches to your language version. I think there should be patches for Italian version of the game beyond the 1.02 patch, but I'm not sure. The highest recommended patch is 1.05, which is fanmade. Though I honestly don't know if there is Italian version of it available.
Secondly, don't worry about your english, it's fine enough. Many of us here has english as second, third or even fourth language, so no worries there. As long as you at least try to use more or less proper english instead of things like "leet language", you are going fine.
And to your problem.
As far as I know, the problem occurs with the fact that the converter was meant to translate 1.00 version saves to 1.02 version. As your saves are 1.01, which is different than 1.00, the converter can't fully understand the saves and the error occurs.
Now, you ask if it's okay to run the game with normal 1.01 patch? I definately say no. Even though the it's possible to beat the game with such version, the list of big bugs is too long to describe and stay sane. And that only includes major bugs, not even close to all those minor bugs and annoyances. So, my suggestion is to upgrade to 1.02, but continue patching to as high as you can find patches to your language version. I think there should be patches for Italian version of the game beyond the 1.02 patch, but I'm not sure. The highest recommended patch is 1.05, which is fanmade. Though I honestly don't know if there is Italian version of it available.
"As we all know, holy men were born during Christmas...
Like mr. Holopainen over there!"
- Marco Hietala, the bass player of Nightwish
Like mr. Holopainen over there!"
- Marco Hietala, the bass player of Nightwish
First of all thank you for your time 
I saw that when installing the translation the games automatically becomes 1.02
So i uninstalled the whole game but leaved the translated files in the fallout 2 dir.
After reinstalling the game i'm able to play in italian even whit the 1.01 version.
The matter is that the 1.01 v is unplayable as u said infact i can't go on in the ghost farm quest...
I should upgrade the game to 1.05 and start from the beginning then.
I saw that when installing the translation the games automatically becomes 1.02
So i uninstalled the whole game but leaved the translated files in the fallout 2 dir.
After reinstalling the game i'm able to play in italian even whit the 1.01 version.
The matter is that the 1.01 v is unplayable as u said infact i can't go on in the ghost farm quest...
I should upgrade the game to 1.05 and start from the beginning then.