I could not avoid trying to find a workaround for this 
Assuming we have a simple SVG file with Arabic text, like this:
<?xml version="1.0" encoding="UTF-8"?>
<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
<g><text x="10" y="50" font-size="52px">
<tspan font-family="Arial">لوحة المفاتيح العربية</tspan>
</text></g></svg>
we can run
inkscape --export-text-to-path --export-plain-svg --export-filename=traced.svg source.svg
which produces
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:cc="http://creativecommons.org/ns#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
version="1.1"
id="svg8">
<metadata
id="metadata14">
<rdf:RDF>
<cc:Work
rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type
rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
</cc:Work>
</rdf:RDF>
</metadata>
<defs
id="defs12" />
<g
id="g6">
<g
aria-label="لوحة المفاتيح العربية"
id="text4"
style="font-size:52px">
<path
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style="font-family:Arial"
id="path16" />
<path
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style="font-family:Arial"
id="path18" />
<path
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style="font-family:Arial"
id="path20" />
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style="font-family:Arial"
id="path22" />
<path
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style="font-family:Arial"
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style="font-family:Arial"
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style="font-family:Arial"
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style="font-family:Arial"
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</g>
</g>
</svg>
Both the original svg and the traced svg look the same. In the first one the text is selectable, in the second one the text has been converted to curves.
It would not be hard to create a script to convert all lines from a text file into separate curve-based svg files, which could then be loaded into any tool that can render SVG files, for example OPENRNDR.
Or even better, create a class in OPENRNDR which calls inkscape and caches the produced svg file. Something like:
val text1 = TracedText("لوحة المفاتيح العربية")
...
drawer.composition(text1)