new file mode 100644
--- /dev/null
+++ b/runtime/spell/pl/main.aap
@@ -0,0 +1,75 @@
+# Aap recipe for Dutch Vim spell files.
+
+# Use a freshly compiled Vim if it exists.
+@if os.path.exists('../../../src/vim'):
+    VIM = ../../../src/vim
+@else:
+    VIM = vim
+
+SPELLDIR = ..
+FILES    = pl_PL.aff pl_PL.dic
+
+all: $(SPELLDIR)/pl.iso-8859-2.spl $(SPELLDIR)/pl.utf-8.spl ../README_pl.txt
+
+$(SPELLDIR)/pl.iso-8859-2.spl : $(VIM) $(FILES)
+        :sys env LANG=pl_PL.ISO8859-2 $(VIM) -e -c "mkspell! $(SPELLDIR)/pl pl_PL" -c q
+
+$(SPELLDIR)/pl.utf-8.spl : $(VIM) $(FILES)
+        :sys env LANG=pl_PL.UTF-8 $(VIM) -e -c "mkspell! $(SPELLDIR)/pl pl_PL" -c q
+
+../README_pl.txt: README_pl_PL.txt
+        :copy $source $target
+
+#
+# Fetching the files from OpenOffice.org.
+#
+OODIR = http://ftp.services.openoffice.org/pub/OpenOffice.org/contrib/dictionaries
+:attr {fetch = $(OODIR)/%file%} pl_PL.zip
+
+# The files don't depend on the .zip file so that we can delete it.
+# Only download the zip file if the targets don't exist.
+pl_PL.aff pl_PL.dic: {buildcheck=}
+        :assertpkg unzip patch
+        :fetch pl_PL.zip
+        :sys $(UNZIP) pl_PL.zip
+        :delete pl_PL.zip
+        @if not os.path.exists('pl_PL.orig.aff'):
+                :copy pl_PL.aff pl_PL.orig.aff
+        @if not os.path.exists('pl_PL.orig.dic'):
+                :copy pl_PL.aff pl_PL.orig.dic
+        :sys patch <pl_PL.diff
+
+
+# Generate diff files, so that others can get the OpenOffice files and apply
+# the diffs to get the Vim versions.
+
+diff:
+        :assertpkg diff
+        :sys {force} diff -a -C 1 pl_PL.orig.aff pl_PL.aff >pl_PL.diff
+        :sys {force} diff -a -C 1 pl_PL.orig.dic pl_PL.dic >>pl_PL.diff
+
+
+# Check for updated OpenOffice spell files.  When there are changes the
+# ".new.aff" and ".new.dic" files are left behind for manual inspection.
+
+check:
+        :assertpkg unzip diff
+        :fetch pl_PL.zip
+        :mkdir tmp
+        :cd tmp
+        @try:
+            @import stat
+            :sys $(UNZIP) ../pl_PL.zip
+            :sys {force} diff ../pl_PL.orig.aff pl_PL.aff >d
+            @if os.stat('d')[stat.ST_SIZE] > 0:
+                :copy pl_PL.aff ../pl_PL.new.aff
+            :sys {force} diff ../pl_PL.orig.dic pl_PL.dic >d
+            @if os.stat('d')[stat.ST_SIZE] > 0:
+                :copy pl_PL.dic ../pl_PL.new.dic
+        @finally:
+            :cd ..
+            :delete {r}{f}{q} tmp
+            :delete pl_PL.zip
+
+
+# vim: set sts=4 sw=4 :