T2442: Make docs.kde.org website translatable

[Carl Schwan]

ognarb claimed this task.

TASK DETAIL
  https://phabricator.kde.org/T2442

To: ognarb
Cc: ognarb, ivanthekdefan, ochurlaud, ltoscano, #documentation, lueck, gennad, 
Anachronox, skadinna, sheedy, lydia, kvermette