Here's a french language file for the OTR plugin.
Eric Ficheuxotrplugin_i18n_fr.properties.zip (896 Bytes)
I'm not sure how the spark guys handle this, but I'd recommend posting this in the spark forum and not as document.
Filed as https://igniterealtime.org/issues/browse/SPARK-1588 Thanks.
Next time start a discussion and attach files there.