Localisation updates from https://translatewiki.net.

[translatewiki]

Translation updates

[erictheise]

I thought I specified that we only wanted translations for a handful of OHM-specific keys but this first batch is so impressive I'm going to accept all of them. There doesn't seem to be much translation activity upstream.

[Abijeet]

I thought I specified that we only wanted translations for a handful of OHM-specific keys but this first batch is so impressive I'm going to accept all of them. There doesn't seem to be much translation activity upstream.

I initially configured translatewiki to ignore those messages. Unfortunately ignoring those messages removes them from exported translations files too, so I marked them as optional instead. I guess translators have been translating them.