nvim: set default spelllang, include it in modeline

.config/nvim/lua/my/functions.lua

@@ -43,6 +43,7 @@ function M.insert_modeline()
         (vim.o.expandtab and ' et' or ' noet'),
         ' tw=' .. vim.o.textwidth,
         ' ft=' .. vim.o.filetype,
+        (vim.o.spell and ' spell' .. ' spl=' .. vim.o.spelllang or ''),
         ':',
         space_maybe
     }

.config/nvim/lua/my/settings.lua

@@ -25,6 +25,7 @@ local options = {
     splitright = true,                      -- split vertical window right
     shada = [['1000,<50,s10,h]],            -- save last 1000 files
     title = true,                           -- set terminal title
+    spelllang = 'en',                       -- words from all regions
 }
 for k, v in pairs(options) do
     vim.o[k] = v