Add instructions for LibreOffice in your language

wiki/src/doc/sensitive_documents/office_suite.mdwn

@@ -20,5 +20,12 @@ The <span class="application">LibreOffice</span> website provides complete [user
 guides](https://wiki.documentfoundation.org/Documentation/Publications) for each
 of these tools, translated into several languages.
 
+To use <span class="application">LibreOffice</span> in your language, you can
+install the <span class="command">libreoffice-l10n-<span class="command-placeholder">lang</span></span>
+package using the [[Additional Software|doc/first_steps/additional_software]]
+feature. Replace <span class="command-placeholder">lang</span> with the code
+for your language. For example, <code>es</code> for Spanish or <code>de</code>
+for German.
+
 [[!inline pages="doc/sensitive_documents/persistence" raw="yes" sort="age"]]
 [[!inline pages="doc/sensitive_documents/metadata" raw="yes" sort="age"]]