nvim: enable spellcheck

.config/nvim/lua/settings.lua

@@ -15,6 +15,8 @@ vim.o.backup = true
 vim.g.netrw_dirhistmax = 0
 vim.o.clipboard = "unnamedplus"
 vim.g.do_filetype_lua = 1
+vim.o.spell = true
+vim.o.spelllang = "en_us"
 
 --- Indent
 vim.o.autoindent = true