Comment 1 for bug 171005

Actually... it depends on how you have things set. At the moment, my
installed inkscape is putting text at the end of the path.

It is controlled by two items. First is the alignment attribute on the
text (start,
middle, end). Second is the startOffset on the textPath element. For text
that
is right-aligned, setting the startOffset to "100%" puts that anchor point
at
the end of the path. "50%" puts it at the middle of the path, etc.

So this Inkscape already supports text at arbitrary positions on a path.