I couldn’t find these strings on Crowdin. (Arabic).
إعجاب واحد (1)
Those strings come from the DiscoTOC - automatic table of contents theme component.
I don’t think theme components are added to Crowdin for translation.
You can easily customize those strings in the settings of the component.
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This is located in the Discourse TOC theme component.
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I think they can be. We currently only have right sidebar blocks on there https://discourse.crowdin.com/right-sidebar-blocks (though I think table builder was too until it was made a core feature). Let me see how easy it would be to add it. 
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This component has been added to Crowdin. Thanks for letting us know and helping us out ! 
Let us know if you still have any issues finding those strings.
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What is the component name?
إعجاب واحد (1)
It should be visible now. We forgot to publish the project, which is a manual step that can’t be automated via API.
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