Add pointer to manpage translation effort

contrib.html

@@ -151,6 +151,14 @@
       you speak fluently), contact the <a href="mailing-lists.html">sane-devel mailing list</a> and
       have a look at the po/ directory in the <a href="cvs.html">source code</a>.
     </p>
+    <p>
+      The translations of the man pages are maintained externally by the <a
+      href="https://salsa.debian.org/manpages-l10n-team/manpages-l10n">manpages-l10n</a> project.
+      Currently they maintain translations of the sane-backends package in 9 languages.
+      Please contact the team for how to contribute, even with translations into a language which
+      this project still doesn't support. For any questions about contributions, please contact
+      <a href="mailto: mario.blaettermann@gmail.com">Mario Bl&auml;ttermann</a>.
+    </p>
 
     <h2>Success reports</h2>
     <p>