For those who is not afraid of hardcore in translating Meta, you can edit directly pages of translation units in Translation: namespace.
Like I did with the last added unit:
https://meta.wikimedia.org/wiki/Translations:Tech/News/2017/20/19/uk
(Sadly, no translation memory suggestions this way).

As I can see from list of pages that start with Translations:Tech/News/2017/20/, units 18 and 19 are undertranslated )))
https://meta.wikimedia.org/w/index.php?title=Special%3APrefixIndex&prefix=Translations%3ATech%2FNews%2F2017%2F20%2F&namespace=0


If it's too scary we may leave it all to Johan and just wait for Translate extension to came back to us (: 

--
Vira Motorko // Віра Моторко
Wikimedia Ukraine nonprofit organisation // ГО «Вікімедіа Україна»
mobile: +380667740499 | facebook: vira.motorko | wikipedia: Ата

If this email is about your daily job and it reaches you outside of the working hours, please, feel free to answer when it's appropriate! // Якщо це робочий лист і Ви отримали його не в робочий час, будь ласка, відповідайте, коли вважаєте за потрібне! 
Якщо маєте електронну скриньку на зразок _@_.ru, задумайтесь, будь ласка, над її зміною. Дякую!

2017-05-13 8:28 GMT+03:00 Johan Jönsson <jjonsson@wikimedia.org>:
On Sat, May 13, 2017 at 5:37 AM, Johan Jönsson <jjonsson@wikimedia.org> wrote:
On Sat, May 13, 2017 at 5:28 AM, Johan Jönsson <jjonsson@wikimedia.org> wrote:
On Sat, May 13, 2017 at 5:18 AM, Sylvain Chiron <chironsylvain@orange.fr> wrote:
Le 12/05/2017 à 01:10, Johan Jönsson a écrit :
> Please do tell me if there's anything I can help you with.)

The messages don’t appear on the translation page. Screenshot:
http://i.imgur.com/OcapEaY.png

The translation tool seems to be broken (I can’t translate anything).

Yeah, I can reproduce – unable to translate anything.  

For anyone who wants to keep track of this issue, I filed a Phabricator task here:

This turned out to be a script error affecting more than the Translate extension; everything should be back to normal now. (:

//Johan Jönsson
-- 

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