I can not find any Language definition in a created SVG file.
Sample:
>>>>

<text
       x="688.75531"
       y="88.603546"
       style="font-size:58.21337128px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;font-family:Arial Unicode MS"
       id="text3415"
       xml:space="preserve"><tspan
         x="688.75531"
         y="88.603546"
         id="tspan3417">Prova di testo in italiano</tspan></text>

>>>>

To transate in local languages the text some indication of the language should be present.

Such indication should be used for browsing the proper version in the proper language.

Best regards.

Marco Ettore Buscaglione
mebusca@tin.it