This python script takes an xml file and translaes all the values tagged with <value> in your target language(set target="LANG_CODE" in the script)

transxml.py

# -*- coding: utf-8 -*- 
from google.cloud import translate
import six
import xml.dom.minidom as minidom


def translate_text(target, text):
    """Translates text into the target language.
    
    Target must be an ISO 639-1 language code.
    See https://g.co/cloud/translate/v2/translate-reference#supported_languages
    """
     
    translate_client = translate.Client.from_service_account_json(
        'YOUR_GCP_KEY_FILE.json')

    if isinstance(text, six.binary_type):
        text = text.decode('utf-8')

    # Text can also be a sequence of strings, in which case this method
    # will return a sequence of results for each text.
    result = translate_client.translate(
        text, target_language=target)

    print(u'Text: {}'.format(result['input']))
    print(u'Translation: {}'.format(result['translatedText']))
    print(u'Detected source language: {}'.format(
        result['detectedSourceLanguage']))
    return result['translatedText']


def main():
    target="hi"
    # use the parse() function to load and parse an XML file
    doc = minidom.parse("language_pack.xml");
    # print out the document node and the name of the first child tag
    print (doc.nodeName)
    print (doc.firstChild.tagName)
    doc.firstChild.setAttribute("Name", target)
    translate_text("fr","hello world")
    Value = doc.getElementsByTagName("Value")
    print ("%d Value:" % Value.length)
    for val in Value:
        print (val.firstChild.data)
        result=translate_text(target,val.firstChild.data)
        print('translation:',result)
        val.firstChild.data=result
        print (val.firstChild.data)

   
    fileName='{}-{}{}'.format('language_pack',target,'.xml')
    file_handle = open(fileName,"wb")
    a=doc.toxml("UTF-8")
    file_handle.write(a)
    file_handle.close()        

   

if __name__ == "__main__":
    main();