made the pack completely portable and wrote relevent bat files to go with it

gitportable/usr/share/vim/vim91/spell/check_locales.vim

@@ -0,0 +1,21 @@
+" Script to check if all the locales used in spell files are available.
+
+grep /sys env LANG/ */main.aap
+let not_supported = []
+for item in getqflist()
+  let lang = substitute(item.text, '.*LANG=\(\S\+\).*', '\1', '')
+  try
+    exe 'lang ' . lang
+  catch /E197/
+    call add(not_supported, lang)
+  endtry
+endfor
+
+if len(not_supported) > 0
+  echo "Unsupported languages:"
+  for l in not_supported
+    echo l
+  endfor
+else
+  echo "Everything appears to be OK"
+endif