Update languages

[PayBas]

Want to push a new version to the phpBB.com CDB soon, so please update your translations :) (submit a PR). Most languages only require 2-4 new lines.

• AR @alhitary
• DE @nickvergessen
• EL @MakisH
• ES @phpbb-es
• ET @phpBBEesti
• FA @php-BB
• IT @Mauron
• PL @jaroslw
• RU @rxu

[alhitary]

Done.
PR is sent to you Dears
@_@

[nickvergessen]

Great idea who to update tranlsations :) will do after work.

[rxu]

Ru: #45.

[bissim]

Hello,
Italian PR is in queue.

[phpbb-es]

PR spanish ready. ;)

Estonian language is ready.