Stéphanie ALVAREZ 

You have at least two problems to work in Excel:

1. you import a file like this into Excel through the Data tab, you don't just open it
2. it needs to have a BOM (Byte Order Mark) to be recognised as UT-8 since the chars are getting corrupted in Excel... cell F3 in your screenshot for example, but there are lots of them.

To open the CSV correctly in Studio you need to specify which columns you want as source and target in the filetype settings.  Currently it's taking the first two, and it's also extracting the header as translatable text which you might not want.

Thank you! I'm sorry I don't know how to have a BOM? 

To open the CSV correctly in Studio you need to specify which columns you want as source and target in the filetype settings.  Currently it's taking the first two => all the text that needs to be translate is on the first column, there are nothing on the other ones. I don't want it to be source and target, just to translate the text, to replace it.

Stéphanie ALVAREZ said:

all the text that needs to be translate is on the first column, there are nothing on the other ones

I doubt that!!  The first column seems to contain exactly what you have shown in the source column f your screenshot.  I don't think that's translatable text.

Looking at your file it seems more likely to be the seventh column, and the translated content looks as though it should be in the eighth.  The reason I think you think everything is in the first column is because you simply opened the file in Excel and everything is in the first column!

Stéphanie ALVAREZ 

Stéphanie ALVAREZ said:

I'm sorry I don't know how to have a BOM? 

A little light reading that should explain:

https://multifarious.filkin.com/2015/12/01/encoding/

Thank you!