Add unsupported languages

You can add unsupported languages by follow these steps.

Syntax highlight

If Treesitter supports your language, then you can run this command to install syntax highlight.

:TSInstall <language>

Language Server Protocol

You can find server for your language Here.

After you've installed the LSP, you need to create a file in after/ftplugin, lua/languages.

-- lua/langauges/your-language.lua
local lsp = require('languages.lsp')
local M = {}

M.lsp_server = '<name of LSP>'

M.lsp = {
    capabilities = lsp.capabilities,
    on_attach = lsp.on_attach,
    -- Any extra configuration should put there
}

return M

-- after/ftplugin/your-language.lua
vim.opt.indentexpr = 'nvim_treesitter#indent()' -- Optional, If you use indent of treesitter

require('cmp').setup.buffer({
    sources = {
        { name = 'nvim_lsp' },
        { name = 'luasnip' }, -- Optional, If you use snippet
        { name = 'path' }, -- Optional, If your language need path
        { name = 'nvim_lsp_signature_help' }, -- Optional, If your language has signature
    },
})

You also need to add your language to /lua/settings.lua

-- /lua/settings.lua
return {
    lspconfigs = {
        filetypes = {
            ...,
            '<your lanugage>',
            ...,
        },
    },
}

Formatter and Linter

You need to install these tools first then go to /lua/languages/<your language>.lua

-- /lua/languages/<your language>.lua
M.efm = {
    {
        formatCommand = 'formatter1',
        formatStdin = true,
    },
    {
        formatCommand = 'formatter2',
        formatStdin = true,
    },
    {
        lintCommand = 'linter1',
        lintIgnoreExitCode = true,
        lintStdin = true,
        lintFormats = {
            'Your linter format',
        },
    },
}

M.all_format = { efm = 'Formatter1   Formatter2   Linter1' }

M.default_format = 'efm'

Debug

You can check debug server here

Test

You can check test tools here