In the parts list template or style for the column calling out material thickness put both exposed variable names for that column. That way it will have a value for parts that have the English exposed name and parts that have the Italian exposed name.
In the image I highlighted what I mean. In some of our older parts we have a property name "Description", in newer parts we have a property name "SE_Description" because we changed our naming for custom properties by adding the prefix "SE_".
This way our parts lists accomodate either property in the column labelled "Description".
I'm testing your solution but this can works only in Parts List in Draft....i'm right? But i need to show the "double property" in Assembly in the Property Manager and/or in the Report Table.
So if i understood what you mean, this way can't works for me.
It was really simple and i was really stupid....just uncheck the Expose, change Exposed Name, than check again and it works.
So now i can change "pretty quickly" the Variable in old files with the @JB method..... and if i update all .psm templates in all PCs with only english Variables (as @bshand suggested), i hope that i will never have again different leanguage properties as i showed you. So i think i can consider this post quite solved.
Than you very much all.
@Jacopodv - Did you find a solution to work with your existing files yet? I have an idea but wasn't sure if you resolved it or not. If not, let me know and I'll give you my idea.
As i said my solution now is: Open an older file, go in Variables Table, change Exposed Name , check again the Expose box....I will do this every time i will open again an older file with the wrong name property.
Is your idea more quickly than mine?