Separate Highlight Groups for Different Languages.

[CREESTL]

Currently I've overridden highlight_groups for one language (Solidity). But. of course, it also changed colors for all other languages.
I want to use specific highlight_groups for a single language and use dafault ones for other languages.
I want something like this:

if (language == "Solidity") {

  highlight_groups = {
    ColorColumn = { bg = 'rose' },
    ['@constructor'] = { fg = 'gold', style = "bold" },
    ['@keyword'] = { fg = 'gold', style = "bold" },  
   ...        
   }

}

Is it possible?

I'm using TreeSitter with Solidity parser installed

[mvllow]

This is out of the scope of the theme at the moment but perhaps you could manually override colours via an autocmd:

vim.api.nvim_create_autocmd("ColorScheme", {
  pattern = ".solidity", -- Or whatever the file extension is
  callback = function()
    -- This hardcodes our "gold" colour but you could require our palette as well.
    vim.api.nvim_set_hl(0, "@constructor", { fg = "#f6c177", style = "bold" })
    vim.api.nvim_set_hl(0, "@keyword", { fg = "#f6c177", style = "bold" })
  end,
})

[CREESTL]

Yeah, the autocmd worked for me. But the ColorScheme event had no matches for .sol files. So I used the FileType instead. Also style = "bold" doesn't work for Nvim Lua API. I used bold=true for that.
Here's what I have:

    vim.api.nvim_create_autocmd("FileType", {
        pattern = {"solidity"}, 
        callback = function()
            vim.api.nvim_set_hl(0, "@constructor", { fg = "#f6c177", bold=true})
            vim.api.nvim_set_hl(0, "@keyword", { fg = "#f6c177" })
        end,
    })