Translations updates needed

[gorshunovr]

Hello everyone. We need support and PRs with translations of:

• README_XX.md files – need to be synced with English README.md version of the file (request for company in examples on lines 6 & 14)
• assets/social-media-preview*.png pictures. This is the picture shown when a link to the Support letter is shared on messengers and websites. Source of picture: link.
  Corresponding _translations/index_XX.md file needs to refer to newly uploaded picture in its header.

Calling on @rldmt @cidoku @mahdyar @ahangarha @doctorx32 @Tyil @Bluesboy @bnainar @jobbautista9 @McSinyx.
Will highlight more names later.

@imachug please, label 'needs help'.

Thank you!

[McSinyx]

It's night time here, I'll be updating the Vietnamese translation tomorrow (I'm on phone atm). Edit: see GH-3933.

[purplesyringa]

I've added the Russian version

[Bluesboy]

@imachug so my assistance don't needed anymore?

[purplesyringa]

Please check if you like it and if you do--no.

[rldmt]

@imachug how did you edit the picture ?

Edit: nvm. I found it.

[Tyil]

The Dutch version of the README still looks fine from what I can see, same goes for the nl_NL version of the picture. Is there anything I'm missing, or could the Dutch versions be up to date already?

[Bluesboy]

Added links to non-Github signing to Russian translation.

[teunissenstefan]

The Dutch version of the README still looks fine from what I can see, same goes for the nl_NL version of the picture. Is there anything I'm missing, or could the Dutch versions be up to date already?

I updated them like 8 hours ago.

[jobbautista9]

@bnainar See #3324.