diff --git a/runtime/lang/Makefile b/runtime/lang/Makefile
index 901c4eb..b4e524a 100644
--- a/runtime/lang/Makefile
+++ b/runtime/lang/Makefile
@@ -25,24 +25,25 @@
 		menu_hu_hu.iso_8859-2.vim \
 		menu_sk_sk.iso_8859-2.vim \
 
+SED = LANG=C sed
 
 # 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 menu_chinese_gb.936.vim
 	iconv -f utf-8 -t cp936 menu_zh_cn.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding cp936/' -e 's/" Original translations/" Generated from menu_zh_cn.utf-8.vim, DO NOT EDIT/' > menu_chinese_gb.936.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp936/' -e 's/" Original translations/" Generated from menu_zh_cn.utf-8.vim, DO NOT EDIT/' > menu_chinese_gb.936.vim
 
 # 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 menu_chinese_taiwan.950.vim
 	iconv -f utf-8 -t cp950 menu_zh_tw.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding cp950/' -e 's/" Original translations/" Generated from menu_zh_tw.utf-8.vim, DO NOT EDIT/' > menu_chinese_taiwan.950.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp950/' -e 's/" Original translations/" Generated from menu_zh_tw.utf-8.vim, DO NOT EDIT/' > menu_chinese_taiwan.950.vim
 
 # 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 menu_cs_cz.iso_8859-2.vim
 	iconv -f utf-8 -t iso8859-2 menu_cs_cz.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding iso-8859-2/' \
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding iso-8859-2/' \
 			-e 's/" Original translations/" Generated from menu_cs_cz.utf-8.vim, DO NOT EDIT/' \
 			-e 's/\(" Menu Translations:.*\)(.*)/\1(ISO8859-2)/'  \
 			> menu_cs_cz.iso_8859-2.vim
@@ -51,7 +52,7 @@
 menu_czech_czech_republic.1250.vim: menu_cs_cz.utf-8.vim
 	rm -f menu_czech_czech_republic.1250.vim
 	iconv -f utf-8 -t cp1250 menu_cs_cz.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding cp1250/'  \
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1250/'  \
 		-e 's/" Original translations/" Generated from menu_cs_cz.utf-8.vim, DO NOT EDIT/'  \
 		-e 's/\(" Menu Translations:.*\)(.*)/\1(CP1250)/'  \
 		> menu_czech_czech_republic.1250.vim
@@ -59,7 +60,7 @@
 # Convert menu_cs_cz.utf-8.vim to create menu_czech_czech_republic.ascii.vim.
 menu_czech_czech_republic.ascii.vim: menu_cs_cz.utf-8.vim
 	rm -f menu_czech_czech_republic.ascii.vim
-	sed -e 's/Á/A/g' -e 's/á/a/g' -e 's/Č/C/g' -e 's/č/c/g' -e 's/Ď/D/g' \
+	$(SED) -e 's/Á/A/g' -e 's/á/a/g' -e 's/Č/C/g' -e 's/č/c/g' -e 's/Ď/D/g' \
 		-e 's/ď/d/g' -e 's/É/E/g' -e 's/é/e/g' -e 's/Ě/E/g' -e 's/ě/e/g' \
 		-e 's/Í/I/g' -e 's/í/i/g' -e 's/Ň/N/g' -e 's/ň/n/g' -e 's/Ó/O/g' \
 		-e 's/ó/o/g' -e 's/Ř/R/g' -e 's/ř/r/g' -e 's/Š/S/g' -e 's/š/s/g' \
@@ -74,7 +75,7 @@
 menu_ja_jp.euc-jp.vim: menu_ja_jp.utf-8.vim
 	rm -f menu_ja_jp.euc-jp.vim
 	iconv -f utf-8 -t euc-jp menu_ja_jp.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding euc-jp/'  \
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding euc-jp/'  \
 		-e 's/" Original translations/" Generated from menu_ja_jp.utf-8.vim, DO NOT EDIT/'  \
 		-e 's/\(" Menu Translations:.*\)(.*)/\1(EUC-JP)/'  \
 		> menu_ja_jp.euc-jp.vim
@@ -83,7 +84,7 @@
 menu_japanese_japan.932.vim: menu_ja_jp.utf-8.vim
 	rm -f menu_japanese_japan.932.vim
 	iconv -f utf-8 -t cp932 menu_ja_jp.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding cp932/'  \
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp932/'  \
 		-e 's/" Original translations/" Generated from menu_ja_jp.utf-8.vim, DO NOT EDIT/' \
 		-e 's/\(" Menu Translations:.*\)(.*)/\1(CP932)/'  \
 		> menu_japanese_japan.932.vim
@@ -92,67 +93,67 @@
 menu_ko_kr.euckr.vim: menu_ko_kr.utf-8.vim
 	rm -f menu_ko_kr.euckr.vim
 	iconv -f utf-8 -t euc-kr menu_ko_kr.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding euc-kr/' -e 's/" Original translations/" Generated from menu_ko_kr.utf-8.vim, DO NOT EDIT/' > menu_ko_kr.euckr.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding euc-kr/' -e 's/" Original translations/" Generated from menu_ko_kr.utf-8.vim, DO NOT EDIT/' > menu_ko_kr.euckr.vim
 
 # 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 menu_pl_pl.iso_8859-2.vim
 	iconv -f utf-8 -t iso8859-2 menu_pl_pl.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding iso-8859-2/' -e 's/" Original translations/" Generated from menu_pl_pl.utf-8.vim, DO NOT EDIT/' > menu_pl_pl.iso_8859-2.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding iso-8859-2/' -e 's/" Original translations/" Generated from menu_pl_pl.utf-8.vim, DO NOT EDIT/' > menu_pl_pl.iso_8859-2.vim
 
 # 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 menu_polish_poland.1250.vim
 	iconv -f utf-8 -t cp1250 menu_pl_pl.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding cp1250/' -e 's/" Original translations/" Generated from menu_pl_pl.utf-8.vim, DO NOT EDIT/' > menu_polish_poland.1250.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1250/' -e 's/" Original translations/" Generated from menu_pl_pl.utf-8.vim, DO NOT EDIT/' > menu_polish_poland.1250.vim
 
 # 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 menu_ru_ru.koi8-r.vim
 	iconv -f utf-8 -t koi8-r menu_ru_ru.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding koi8-r/' -e 's/" Original translations/" Generated from menu_ru_ru.utf-8.vim, DO NOT EDIT/' > menu_ru_ru.koi8-r.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding koi8-r/' -e 's/" Original translations/" Generated from menu_ru_ru.utf-8.vim, DO NOT EDIT/' > menu_ru_ru.koi8-r.vim
 
 # 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 menu_sl_si.cp1250.vim
 	iconv -f utf-8 -t cp1250 menu_sl_si.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding cp1250/'  \
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1250/'  \
 		-e 's/" Original translations/" Generated from menu_sl_si.utf-8.vim, DO NOT EDIT/' > menu_sl_si.cp1250.vim
 
 # Convert menu_uk_ua.utf-8.vim to create menu_sl_si.latin2.vim.
 menu_sl_si.latin2.vim: menu_sl_si.utf-8.vim
 	rm -f menu_sl_si.latin2.vim
 	iconv -f utf-8 -t latin2 menu_sl_si.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding latin2/' -e 's/" Original translations/" Generated from menu_sl_si.utf-8.vim, DO NOT EDIT/' > menu_sl_si.latin2.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding latin2/' -e 's/" Original translations/" Generated from menu_sl_si.utf-8.vim, DO NOT EDIT/' > menu_sl_si.latin2.vim
 
 # Convert menu_uk_ua.utf-8.vim to create menu_slovak_slovak_republic.1250.vim.
 menu_slovak_slovak_republic.1250.vim: menu_sl_si.utf-8.vim
 	rm -f menu_slovak_slovak_republic.1250.vim
 	iconv -f utf-8 -t cp1250 menu_sl_si.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding cp1250/' -e 's/" Original translations/" Generated from menu_sl_si.utf-8.vim, DO NOT EDIT/' > menu_slovak_slovak_republic.1250.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1250/' -e 's/" Original translations/" Generated from menu_sl_si.utf-8.vim, DO NOT EDIT/' > menu_slovak_slovak_republic.1250.vim
 
 # 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 menu_tr_tr.cp1254.vim
 	iconv -f utf-8 -t cp1254 menu_tr_tr.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding cp1254/' -e 's/" Original translations/" Generated from menu_tr_tr.utf-8.vim, DO NOT EDIT/' > menu_tr_tr.cp1254.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1254/' -e 's/" Original translations/" Generated from menu_tr_tr.utf-8.vim, DO NOT EDIT/' > menu_tr_tr.cp1254.vim
 
 # 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 menu_tr_tr.iso_8859-9.vim
 	iconv -f utf-8 -t iso8859-9 menu_tr_tr.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding iso8859-9/' -e 's/" Original translations/" Generated from menu_tr_tr.utf-8.vim, DO NOT EDIT/' > menu_tr_tr.iso_8859-9.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding iso8859-9/' -e 's/" Original translations/" Generated from menu_tr_tr.utf-8.vim, DO NOT EDIT/' > menu_tr_tr.iso_8859-9.vim
 
 # 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 menu_sr_rs.iso_8859-5.vim
 	iconv -f utf-8 -t iso8859-5 menu_sr_rs.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding iso8859-5/' -e 's/" Original translations/" Generated from menu_sr_rs.utf-8.vim, DO NOT EDIT/' > menu_sr_rs.iso_8859-5.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding iso8859-5/' -e 's/" Original translations/" Generated from menu_sr_rs.utf-8.vim, DO NOT EDIT/' > menu_sr_rs.iso_8859-5.vim
 
 # Convert menu_sr_rs.utf-8.vim to create menu_sr_rs.iso_8859-2.vim.
 menu_sr_rs.iso_8859-2.vim: menu_sr_rs.utf-8.vim
 	rm -f menu_sr_rs.iso_8859-2.vim
-	sed -e 's/а/a/g' -e 's/б/b/g' -e 's/в/v/g' -e 's/г/g/g' -e 's/д/d/g' \
+	$(SED) -e 's/а/a/g' -e 's/б/b/g' -e 's/в/v/g' -e 's/г/g/g' -e 's/д/d/g' \
 		-e 's/ђ/đ/g' -e 's/е/e/g' -e 's/ж/ž/g' -e 's/з/z/g' -e 's/и/i/g' \
 		-e 's/ј/j/g' -e 's/к/k/g' -e 's/л/l/g' -e 's/љ/lj/g' -e 's/м/m/g' \
 		-e 's/н/n/g' -e 's/њ/nj/g' -e 's/о/o/g' -e 's/п/p/g' -e 's/р/r/g' \
@@ -171,7 +172,7 @@
 # Convert menu_sr_rs.utf-8.vim to create menu_sr_rs.ascii.vim.
 menu_sr_rs.ascii.vim: menu_sr_rs.utf-8.vim
 	rm -f menu_sr_rs.ascii.vim
-	sed -e 's/а/a/g' -e 's/б/b/g' -e 's/в/v/g' -e 's/г/g/g' -e 's/д/d/g' \
+	$(SED) -e 's/а/a/g' -e 's/б/b/g' -e 's/в/v/g' -e 's/г/g/g' -e 's/д/d/g' \
 		-e 's/ђ/dj/g' -e 's/е/e/g' -e 's/ж/z/g' -e 's/з/z/g' -e 's/и/i/g' \
 		-e 's/ј/j/g' -e 's/к/k/g' -e 's/л/l/g' -e 's/љ/lj/g' -e 's/м/m/g' \
 		-e 's/н/n/g' -e 's/њ/nj/g' -e 's/о/o/g' -e 's/п/p/g' -e 's/р/r/g' \
@@ -190,22 +191,22 @@
 menu_uk_ua.cp1251.vim: menu_uk_ua.utf-8.vim
 	rm -f menu_uk_ua.cp1251.vim
 	iconv -f utf-8 -t cp1251 menu_uk_ua.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding cp1251/' -e 's/" Original translations/" Generated from menu_uk_ua.utf-8.vim, DO NOT EDIT/' > menu_uk_ua.cp1251.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding cp1251/' -e 's/" Original translations/" Generated from menu_uk_ua.utf-8.vim, DO NOT EDIT/' > menu_uk_ua.cp1251.vim
 
 # 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 menu_uk_ua.koi8-u.vim
 	iconv -f utf-8 -t koi8-u menu_uk_ua.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding koi8-u/' -e 's/" Original translations/" Generated from menu_uk_ua.utf-8.vim, DO NOT EDIT/' > menu_uk_ua.koi8-u.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding koi8-u/' -e 's/" Original translations/" Generated from menu_uk_ua.utf-8.vim, DO NOT EDIT/' > menu_uk_ua.koi8-u.vim
 
 # 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 menu_hu_hu.iso_8859-2.vim
 	iconv -f utf-8 -t iso8859-2 menu_hu_hu.utf-8.vim | \
-		sed -e 's/scriptencoding utf-8/scriptencoding iso-8859-2/' -e 's/" Original translations/" Generated from menu_hu_hu.utf-8.vim, DO NOT EDIT/' > menu_hu_hu.iso_8859-2.vim
+		$(SED) -e 's/scriptencoding utf-8/scriptencoding iso-8859-2/' -e 's/" Original translations/" Generated from menu_hu_hu.utf-8.vim, DO NOT EDIT/' > menu_hu_hu.iso_8859-2.vim
 
 # 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 menu_sk_sk.iso_8859-2.vim
 	iconv -f cp1250 -t iso8859-2 menu_slovak_slovak_republic.1250.vim | \
-		sed -e 's/scriptencoding cp1250/scriptencoding iso-8859-2/' -e 's/" Original translations/" Generated from menu_slovak_slovak_republic.1250.vim, DO NOT EDIT/' > menu_sk_sk.iso_8859-2.vim
+		$(SED) -e 's/scriptencoding cp1250/scriptencoding iso-8859-2/' -e 's/" Original translations/" Generated from menu_slovak_slovak_republic.1250.vim, DO NOT EDIT/' > menu_sk_sk.iso_8859-2.vim