diff --git a/runtime/lang/Makefile b/runtime/lang/Makefile
index d5f2ed6..211d492 100644
--- a/runtime/lang/Makefile
+++ b/runtime/lang/Makefile
@@ -13,34 +13,34 @@
 # Convert menu_zh_cn.utf-8.vim to create menu_chinese_gb.936.vim.
 menu_chinese_gb.936.vim: menu_zh_cn.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t CP936 $< | \
+	iconv -f UTF-8 -t CP936 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp936/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_zh_tw.utf-8.vim to create menu_chinese_taiwan.950.vim.
 menu_chinese_taiwan.950.vim: menu_zh_tw.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t CP950 $< | \
+	iconv -f UTF-8 -t CP950 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp950/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_cs_cz.utf-8.vim to create menu_cs_cz.iso_8859-2.vim.
 menu_cs_cz.iso_8859-2.vim: menu_cs_cz.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t ISO-8859-2 $< | \
+	iconv -f UTF-8 -t ISO-8859-2 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding iso-8859-2/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			-e 's/\(" Menu Translations:.*\)(.*)/\1(ISO-8859-2)/' \
 			> $@
 
 # Convert menu_cs_cz.utf-8.vim to create menu_czech_czech_republic.1250.vim.
 menu_czech_czech_republic.1250.vim: menu_cs_cz.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t CP1250 $< | \
+	iconv -f UTF-8 -t CP1250 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1250/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			-e 's/\(" Menu Translations:.*\)(.*)/\1(CP1250)/' \
 			> $@
 
@@ -54,107 +54,107 @@
 		-e 's/Ť/T/g' -e 's/ť/t/g' -e 's/Ú/U/g' -e 's/ú/u/g' -e 's/Ů/U/g' \
 		-e 's/ů/u/g' -e 's/Ý/Y/g' -e 's/ý/y/g' -e 's/Ž/Z/g' -e 's/ž/z/g' \
 		-e 's/scriptencoding utf-8/scriptencoding latin1/' \
-		-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+		-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 		-e 's/\(" Menu Translations:.*\)(.*)/\1(ASCII - without diacritics)/' \
-		$< > $@
+		$? > $@
 
 # Convert menu_ja_jp.utf-8.vim to create menu_ja_jp.euc-jp.vim.
 menu_ja_jp.euc-jp.vim: menu_ja_jp.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t EUC-JP $< | \
+	iconv -f UTF-8 -t EUC-JP $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding euc-jp/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			-e 's/\(" Menu Translations:.*\)(.*)/\1(EUC-JP)/' \
 			> $@
 
 # Convert menu_ja_jp.utf-8.vim to create menu_japanese_japan.932.vim.
 menu_japanese_japan.932.vim: menu_ja_jp.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t CP932 $< | \
+	iconv -f UTF-8 -t CP932 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp932/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			-e 's/\(" Menu Translations:.*\)(.*)/\1(CP932)/' \
 			> $@
 
 # Convert menu_ko_kr.utf-8.vim to create menu_ko_kr.euckr.vim.
 menu_ko_kr.euckr.vim: menu_ko_kr.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t EUC-KR $< | \
+	iconv -f UTF-8 -t EUC-KR $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding euc-kr/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_pl_pl.utf-8.vim to create menu_pl_pl.iso_8859-2.vim.
 menu_pl_pl.iso_8859-2.vim: menu_pl_pl.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t ISO-8859-2 $< | \
+	iconv -f UTF-8 -t ISO-8859-2 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding iso-8859-2/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_pl_pl.utf-8.vim to create menu_polish_poland.1250.vim.
 menu_polish_poland.1250.vim: menu_pl_pl.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t CP1250 $< | \
+	iconv -f UTF-8 -t CP1250 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1250/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_ru_ru.utf-8.vim to create menu_ru_ru.koi8-r.vim.
 menu_ru_ru.koi8-r.vim: menu_ru_ru.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t KOI8-R $< | \
+	iconv -f UTF-8 -t KOI8-R $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding koi8-r/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_ru_ru.utf-8.vim to create menu_ru_ru.cp1251.vim.
 menu_ru_ru.cp1251.vim: menu_ru_ru.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t CP1251 $< | \
+	iconv -f UTF-8 -t CP1251 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1251/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_sl_si.utf-8.vim to create menu_sl_si.cp1250.vim.
 menu_sl_si.cp1250.vim: menu_sl_si.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t CP1250 $< | \
+	iconv -f UTF-8 -t CP1250 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1250/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # for naming encodings, see `:h encoding-names`
 # Convert menu_sl_si.utf-8.vim to create menu_sl_si.latin2.vim.
 menu_sl_si.latin2.vim: menu_sl_si.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t ISO-8859-2 $< | \
+	iconv -f UTF-8 -t ISO-8859-2 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding iso-8859-2/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_tr_tr.utf-8.vim to create menu_tr_tr.cp1254.vim.
 menu_tr_tr.cp1254.vim: menu_tr_tr.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t CP1254 $< | \
+	iconv -f UTF-8 -t CP1254 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1254/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_tr_tr.utf-8.vim to create menu_tr_tr.iso_8859-9.vim.
 menu_tr_tr.iso_8859-9.vim: menu_tr_tr.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t ISO-8859-9 $< | \
+	iconv -f UTF-8 -t ISO-8859-9 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding iso-8859-9/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_sr_rs.utf-8.vim to create menu_sr_rs.iso_8859-5.vim.
 menu_sr_rs.iso_8859-5.vim: menu_sr_rs.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t ISO-8859-5 $< | \
+	iconv -f UTF-8 -t ISO-8859-5 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding iso-8859-5/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # for naming encodings, see `:h encoding-names`
@@ -174,8 +174,8 @@
 		-e 's/С/S/g' -e 's/Т/T/g' -e 's/Ћ/Ć/g' -e 's/У/U/g' -e 's/Ф/F/g' \
 		-e 's/Х/H/g' -e 's/Ц/C/g' -e 's/Ч/Č/g' -e 's/Џ/Dž/g' -e 's/Ш/Š/g' \
 		-e 's/scriptencoding utf-8/scriptencoding iso-8859-2/' \
-		-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
-		$< | iconv -f UTF-8 -t ISO-8859-2 \
+		-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
+		$? | iconv -f UTF-8 -t ISO-8859-2 \
 		> $@
 
 # Convert menu_sr_rs.utf-8.vim to create menu_sr_rs.ascii.vim.
@@ -194,39 +194,39 @@
 		-e 's/С/S/g' -e 's/Т/T/g' -e 's/Ћ/C/g' -e 's/У/U/g' -e 's/Ф/F/g' \
 		-e 's/Х/H/g' -e 's/Ц/C/g' -e 's/Ч/C/g' -e 's/Џ/Dz/g' -e 's/Ш/S/g' \
 		-e 's/scriptencoding utf-8/scriptencoding latin1/' \
-		-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
-		$< > $@
+		-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
+		$? > $@
 	
 # Convert menu_uk_ua.utf-8.vim to create menu_uk_ua.cp1251.vim.
 menu_uk_ua.cp1251.vim: menu_uk_ua.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t CP1251 $< | \
+	iconv -f UTF-8 -t CP1251 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1251/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_uk_ua.utf-8.vim to create menu_uk_ua.koi8-u.vim.
 menu_uk_ua.koi8-u.vim: menu_uk_ua.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t KOI8-U $< | \
+	iconv -f UTF-8 -t KOI8-U $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding koi8-u/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_hu_hu.utf-8.vim to create menu_hu_hu.iso_8859-2.vim.
 menu_hu_hu.iso_8859-2.vim: menu_hu_hu.utf-8.vim
 	rm -f $@
-	iconv -f UTF-8 -t ISO-8859-2 $< | \
+	iconv -f UTF-8 -t ISO-8859-2 $? | \
 		$(SED) -e 's/scriptencoding utf-8/scriptencoding iso-8859-2/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 # Convert menu_slovak_slovak_republic.1250.vim to create menu_sk_sk.iso_8859-2.vim.
 menu_sk_sk.iso_8859-2.vim: menu_slovak_slovak_republic.1250.vim
 	rm -f $@
-	iconv -f CP1250 -t ISO-8859-2 $< | \
+	iconv -f CP1250 -t ISO-8859-2 $? | \
 		$(SED) -e 's/scriptencoding cp1250/scriptencoding iso-8859-2/' \
-			-e 's/" Original translations/" Generated from $<, DO NOT EDIT/' \
+			-e 's/" Original translations/" Generated from $?, DO NOT EDIT/' \
 			> $@
 
 clean: