.xliff or .po for translating content massively
An xml format that is supported by many professional translation tools
OmegaT is an opensource professional translation tool: 
http://www.omegat.org/en/omegat.html

export source language, and reimport target language, keeping the nodes linked between languages.
CONTEXT(Help)
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DebateGraph Community »DebateGraph Community
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Development Ideas »Development Ideas
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New features? »New features?
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Importing / Exporting »Importing / Exporting
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Software / formats that you would like to export to / import from? »Software / formats that you would like to export to / import from?
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xml import/export »xml import/export
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.xliff or .po for translating content massively
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Translate Debategraph content »Translate Debategraph content
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Translate a complete map (or a view of a map) »Translate a complete map (or a view of a map)
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