replace strings in an xml document using a 1:1 replacement file

For a Linux OS to be distributed I have an Openbox menu.xml file that contains about 30 words that would need to be translated for that menu to be localized. I assembled a .csv document with two columns: the English originals in the first (a couple of which include a space), translations in the second. I will be repeating this for something like 12 languages.

Here is a sample menu entry in which "File manager" is the target for translation:

<item label="File manager">
    <action name="Execute"><execute>thunar</execute></action>
  </item>

I need a way to search the menu.xml document string-by-string, replacing all occurrences of a given string with a translation. BTW: functional terms such as execute, action, item etc. do not appear in the csv list.

From an earlier project I have a script in R from my son that works with a flat file (Fluxbox menu) but does not make the substitutions in this case so I hope to find a Bash solution with which I am familiar. Thanks for any help.

Because you said, python could be a solution:

Updated, for namespace!

import xml.etree.ElementTree as ET
import csv

root = ET.parse("menu.xml").getroot()
ns = {'': 'http://openbox.org/', 'xsi': 'http://www.w3.org/2001/XMLSchema-instance'}
ET.register_namespace('', "http://openbox.org/")

# csv English, French
with open("translate.csv", "r") as f:
    csvFile =csv.reader(f)
    for lines in csvFile:
        print(lines[0], lines[1])

        for item in root.findall('.//{*}menu', ns):
            for m in item.iter():
                if m.tag == "{http://openbox.org/}item":
                    if m.get('label') == lines[0]:
                        m.set("label",lines[1].lstrip())

# Pretty Print and write to file
print()
tree = ET.ElementTree(root)
ET.indent(tree, space="  ")
tree.write("menu_fr.xml", xml_declaration=True, encoding="utf-8")

ET.dump(root)

Output:

File manager  Gestionnaire de fichiers
File  fichier

<openbox_menu xmlns="http://openbox.org/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://openbox.org/ file:///usr/share/openbox/menu.xsd">
  <menu id=" ID " label=" TITEL " icon=" SYMBOL ">
    <item label="Gestionnaire de fichiers" icon=" SYMBOL "> AKTIONEN 
  </item>
    <separator label="Überschrift" />
    <menu id=" ID " />
    <separator />
    <menu id=" ID " label=" TITEL " icon=" SYMBOL ">
      <item label="fichier" icon="SYMBOL"> AKTIONEN 
    </item>
    </menu>
    <separator />
    <item label="LABEL" icon="SYMBOL"> AKTIONEN 
  </item>
  </menu>
</openbox_menu>