Hi Bertrand,
Office 2013 Language Options:
Microsoft Office 2013 Language Packs
Service Pack 1 for Microsoft Office 2013 Language Pack (KB2817427) 64-Bit Edition. Service Pack 1 for Microsoft Office 2013 Language Pack 64-Bit Edition contains new updates which improve security, performance, and stability. Additionally, the SP is a roll-up of all previously released updates. Feb 13, 2014 Service Pack 1 for Microsoft Office 2013 Language Pack 32-Bit Edition contains new updates which improve security, performance, and stability. Additionally, the SP is a roll-up of all previously released updates.
https://support.office.com/en-ie/article/Buy-install-configure-or-uninstall-a-language-pack-for-Office-2013-a07f7a24-d9f2-429b-affc-752d4cb1fe1f
Office 2013 Pro Plus All Lan Office 2013 Pro Plus All Language Packs Download Links x86 / x64. By novemberra1n, March 1, 2013 in Software Updates Microsoft Office 2013; All Language. Mar 27, 2014 Heute ein Tutorial, um Languagepacks bei Microsoft Office 2013 zu installieren.http://www.heidoc.net/joomla/technology-science/microsoft/73-office-2013-direc. Microsoft Office 2013 Language Pack Service Pack 1 (SP1) provides the latest updates for Office 2013 Language Pack. This service pack includes two kinds of fixes: Previously unreleased fixes that are included in this service pack. In addition to general product fixes, these fixes include improvements in stability, performance, and security.