linux/.config/nvim/lua/plugin/lsp/Tex.lua

local lspconfig = require('lspconfig')
local config = {
	filetypes = { 'text', 'bib', 'gitcommit', 'markdown', 'org', 'plaintex', 'rst', 'rnoweb', 'tex', 'pandoc' },
	settings = {
		['ltex'] = {
			language = "auto"
		}
	}
}

lspconfig.ltex.setup(config)

vim.api.nvim_create_user_command('SCOn', function (args)
	lspconfig.ltex.setup(config)
end, { desc = "Enable spellcheck." })

vim.api.nvim_create_user_command('SCOff', function (args)
	lspconfig.ltex.setup { filetypes = {} }
end, { desc = "Disable spellcheck." })

vim.api.nvim_create_user_command('SCLangRU', function (args)
	config.settings['ltex'].language = "ru-RU"
	lspconfig.ltex.setup(config)
end, { desc = "Set spellcheck to Russian." })

vim.api.nvim_create_user_command('SCLangEN', function (args)
	config.settings['ltex'].language = "en-US"
	lspconfig.ltex.setup(config)
end, { desc = "Set spellcheck to English." })

vim.api.nvim_create_user_command('SCLangAuto', function (args)
	config.settings['ltex'].language = "auto"
	lspconfig.ltex.setup(config)
end, { desc = "Set spellcheck to Auto." })

vim.api.nvim_create_user_command('SCForce', function (args)
	vim.cmd("setfiletype text")
	vim.cmd("SCOn")
end, { desc = "Set buffer type to text." })

vim.api.nvim_create_user_command('SCReset', function (args)
	vim.cmd("filetype detect")
	vim.cmd("SCLangAuto")
end, { desc = "Set buffer type to auto." })

vim.api.nvim_create_user_command('SCInfo', function (args)
	vim.cmd("LspInfo")
end, { desc = "Show info about spellcheck." })

vim.api.nvim_create_user_command('SCInstall', function (args)
	vim.cmd("MasonInstall ltex-ls")
end, { desc = "Install spellcheck (requires Mason)." })