what's the way forward?

If you want to know why Elgg  "seems to be in the midst of a targeted attack" (Matt Beckett) by spammers from all over the world lately -- you can read this discussion:  https://elgg.org/discussion/view/2311301/high-spam-rates-on-elgg-community-site-since-april-16-2015

Ok Juho Jaakkola for this outdated translation string, but empty mails come from elgg.org... so elgg core team have to update this string !

Regarding the spam; Matt has updated the spam_login_filter to be compatible with Elgg 2.0, so the amount of spam should get reduced now.

@ManUtopiK Your community notifications are in French, right? You can add the French translation for the string here: https://www.transifex.com/elgg/elgg-core-2/viewstrings/#fr/discussions/58930072 (Create an account and request author permission if you don't have those yet.)

Done.

I talk about elgg.org mail notifications. It's curious to see empty mail because there is a fallback to english translation...

The reason they are empty isn't because the translation is not available, but because it IS available but it has the wrong number of replacement (%s) strings. It needs to be corrected before it will work.

Again, Chinese spam posts opening https://elgg.org/activity

Will be grateful if someone deletes this timely.  Are all plugins failing ? Thanks