Export a PDF of your document, then, in Acrobat, export the PDF as a Word document, you'll have what you need!
However, I would check for alternative translators; every translation house I've used over the past 20 years ask for a .IDML file for the translation of an ID document. You'll get an InDesign document back that – depending on how the translated text fits – may just need to make a few adjustments.
Export a PDF of your document, then, in Acrobat, export the PDF as a Word document, you'll have what you need!
However, I would check for alternative translators; every translation house I've used over the past 20 years ask for a .IDML file for the translation of an ID document. You'll get an InDesign document back that – depending on how the translated text fits – may just need to make a few adjustments.