Add Latin language tag example.
--- a/www/HACKING.rst Sun Mar 13 22:46:39 2016 +0200
+++ b/www/HACKING.rst Sun Mar 13 23:01:28 2016 +0200
@@ -115,7 +115,12 @@
Synonyms marked by ``syn:``, antonyms marked by ``ant:``.
-Translation marked by lowercase ISO 639-1 code, like ``en:``, ``ru:``, ``uk:``.
+Translation marked by lowercase ISO 639-1 code, like:
+
+* ``en:`` - English
+* ``ru:`` - Russian
+* ``uk:`` - Ukrainian
+* ``la:`` - Latin
Pronunciation variants marked by ``Am`` - American, ``Br`` - Great Britain,
``Au`` - Australia.