The SuluArticleBundle is able to export the content of the articles into a XLIFF format. The resulting file can be used by a translation tool or send to a translation agency.
They can extend the file with the translation and after that imported by the developer.
Export:
$ bin/adminconsole sulu:article:export export.xliff en
Article Language Export
=======================
Options
Target: export.xliff
Locale: en
Format: 1.2.xliff
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Continue with this options?(y/n) y
Continue!
Loading Data…
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Render Xliff…Import:
$ bin/adminconsole sulu:article:import export.xliff de --overrideSettings
Language Import
===============
Options
Locale: de
Format: 1.2.xliff
Override Setting: YES
---------------
Continue with this options? Be careful! (y/n) y
Continue!
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Import Result
===============
1 Documents imported.
0 Documents ignored.