Bonsoir Barachoie,
A coller dans le module de la feuille 'Mo' puis double-clic sur [A1].
Private Sub Worksheet_BeforeDoubleClick(ByVal Target As Range, Cancel As Boolean)
'
Dim tData
Cancel = True
'
If Not Intersect(Target, Range("A1")) Is Nothing Then
iRow = Range("A" & Rows.Count).End(xlUp).Row
tData = Range("A2:L" & iRow).Value
'
For x = 1 To UBound(tData, 1)
tData(x, 5) = tData(x, 5) & Chr(126) & tData(x, 10)
Next
Worksheets("datas").Range("A2:L" & iRow) = tData
End If
'
End Sub
A+