MENDELU/Sync translations from v7 to v9 (#1091)

* Merge pull request #4641 from dataquest-dev/update-czech-translations

[WIP] Added czech translations to `cs.json5`

* WIP translations of untranslated czech messages

* Translated all czech messages

* Revised changed translations

* check grammer, fix errors

* Translated back from context

* Review of translations

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Co-authored-by: Tim Donohue <[email protected]>
Co-authored-by: Matus Kasak <[email protected]>
Co-authored-by: milanmajchrak <[email protected]>
Co-authored-by: Paurikova2 <[email protected]>

Author: 5 people