I you don't mind digging within the SVG file, you can edit it as text and you will notice its XML format. There, you are able to find+replace specific parameters for almost any field (tag). For example a sample text could appear like this:
<text style="font-family: Arial, sans-serif; font-size: 12px; font-weight: bold;">This is an example</text>
I hope this helps you with your question