-Update from WebTranslator v3.0:
japanese - 31 changes by guppy
lithuanian - 3 changes by Stabilitronas
persian - 5 changes by 100ra
slovak - 6 changes by Milsa


git-svn-id: http://svn.openttd.org/trunk@26572 6aa0318a-3be1-0310-93fa-89fd2396df07