writing simultaneously on 2 layers

[#1]

Hi, 

I'd like to ask you if it's possible to write at the same time on 2 layers.

I'm working on a file made by a person who doesn't work here anymore. She made a long catalogue with tabs, prices, infos etc, on 2 different layers: one with italian texts and one with english texts. 

Now I have to update all the prices and the column of prices is the same: there's no change from a layer to another. 

So I'd like to insert the text just one time!

Somebody can help me? 

Thank you very much!

Lisa

[#2]

Hi, 

I'd like to ask you if it's possible to write at the same time on 2 layers.

I'm working on a file made by a person who doesn't work here anymore. She made a long catalogue with tabs, prices, infos etc, on 2 different layers: one with italian texts and one with english texts. 

Now I have to update all the prices and the column of prices is the same: there's no change from a layer to another. 

So I'd like to insert the text just one time!

Somebody can help me? 

Thank you very much!

Lisa

[#3]

Because the pricing could have been done in many different possible ways, a screen capture would be helpful to suggest the best course of action.