diff --git a/Firmware/ultralcd.cpp b/Firmware/ultralcd.cpp
index 74e0b349..53a53d20 100644
--- a/Firmware/ultralcd.cpp
+++ b/Firmware/ultralcd.cpp
@@ -27,23 +27,6 @@
 #endif //TMC2130
 
 
-#include <stdarg.h>
-
-int lcd_puts_P(const char* str)
-{
-	return fputs_P(str, lcdout);
-}
-
-int lcd_printf_P(const char* format, ...)
-{
-	va_list args;
-	va_start(args, format);
-	int ret = vfprintf_P(lcdout, format, args);
-	va_end(args);
-	return ret;
-}
-
-
 int8_t encoderDiff; /* encoderDiff is updated from interrupt context and added to encoderPosition every LCD update */
 
 extern int lcd_change_fil_state;
@@ -315,7 +298,6 @@ static void menu_action_setting_edit_callback_long5(const char* pstr, unsigned l
 #endif
 #endif
 
-
 /* Helper macros for menus */
 #define START_MENU() do { \
     if (encoderPosition > 0x8000) encoderPosition = 0; \
@@ -427,6 +409,48 @@ static void lcd_goto_menu(menuFunc_t menu, const uint32_t encoder = 0, const boo
 /* Main status screen. It's up to the implementation specific part to show what is needed. As this is very display dependent */
 
 
+#include <stdarg.h>
+
+int lcd_puts_P(const char* str)
+{
+	return fputs_P(str, lcdout);
+}
+
+int lcd_printf_P(const char* format, ...)
+{
+	va_list args;
+	va_start(args, format);
+	int ret = vfprintf_P(lcdout, format, args);
+	va_end(args);
+	return ret;
+}
+
+#ifdef DEBUG_MENU_PRINTF_TEST
+int menu_item_printf_P(uint8_t& item, uint8_t line, const char* format, ...)
+{
+	va_list args;
+	va_start(args, format);
+	int ret = 0;
+	if (item == line)
+	{
+		if (lcdDrawUpdate)
+		{
+			//ret = 
+		    lcd.setCursor(0, line);
+			lcd.print(' ');
+			int cnt = vfprintf_P(lcdout, format, args);
+			for (int i = cnt; i < 19; i++)
+				lcd.print(' ');
+			lcd.print('>');
+		}
+	}
+	item++;
+	va_end(args);
+	return ret;
+}
+#endif //DEBUG_MENU_PRINTF_TEST
+
+
 static void lcd_status_screen()
 {
   if (firstrun == 1) 
@@ -5589,6 +5613,10 @@ static void lcd_main_menu()
   MENU_ITEM(submenu, _i("Support"), lcd_support_menu);////MSG_SUPPORT c=0 r=0
   MENU_ITEM(submenu, _i("W25x20XL init"), lcd_test_menu);////MSG_SUPPORT c=0 r=0
 
+#ifdef DEBUG_MENU_PRINTF_TEST
+	menu_item_printf_P(_menuItemNr, _lineNr, _N("Test %d %d %d"), 0, 1, 2);
+#endif //DEBUG_MENU_PRINTF_TEST
+
   END_MENU();
 
 }
diff --git a/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h b/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h
index 2cf61d55..4c9f2433 100644
--- a/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h
@@ -149,6 +149,7 @@
 //#define DEBUG_BUILD
 //#define DEBUG_SEC_LANG   //secondary language debug output at startup
 //#define DEBUG_W25X20CL   //debug external spi flash
+//#define DEBUG_MENU_PRINTF_TEST
 #ifdef DEBUG_BUILD
 //#define _NO_ASM
 #define DEBUG_DCODES //D codes
diff --git a/lang/make_lang.sh b/lang/make_lang.sh
index d34aad3f..0f7bc7d4 100644
--- a/lang/make_lang.sh
+++ b/lang/make_lang.sh
@@ -5,18 +5,18 @@
 #
 # Input files:
 #  lang_en.txt
-#  lang_en_$LANG.txt
+#  lang_en_xx.txt
 #
 # Output files:
 #  lang_en.tmp (temporary, will be removed when finished)
-#  lang_en_$LANG.tmp ==||==
-#  lang_en_$LANG.dif ==||==
-#  lang_$LANG.txt
+#  lang_en_xx.tmp ==||==
+#  lang_en_xx.dif ==||==
+#  lang_xx.txt
 #
 #
 # Selected language:
-LANG=$1
-if [ -z "$LANG" ]; then LANG='cz'; fi
+LNG=$1
+if [ -z "$LNG" ]; then LNG='cz'; fi
 #
 #
 
@@ -24,8 +24,8 @@ finish()
 {
  if [ $1 -eq 0 ]; then
   if [ -e lang_en.tmp ]; then rm lang_en.tmp; fi
-  if [ -e lang_en_$LANG.tmp ]; then rm lang_en_$LANG.tmp; fi
-  if [ -e lang_en_$LANG.dif ]; then rm lang_en_$LANG.dif; fi
+  if [ -e lang_en_$LNG.tmp ]; then rm lang_en_$LNG.tmp; fi
+  if [ -e lang_en_$LNG.dif ]; then rm lang_en_$LNG.dif; fi
  fi
 # echo >&2
  if [ $1 -eq 0 ]; then
@@ -38,59 +38,59 @@ finish()
 
 make_lang()
 {
-LANG=$1
+LNG=$1
 
 echo "make_lang.sh started" >&2
-echo "selected language=$LANG" >&2
+echo "selected language=$LNG" >&2
 
 #check if input files exists
 echo -n " checking input files..." >&2
 if [ ! -e lang_en.txt ]; then echo "NG!  file lang_en.txt not found!" >&2; exit 1; fi
-if [ ! -e lang_en_$LANG.txt ]; then echo "NG!  file lang_en_$LANG.txt not found!" >&2; exit 1; fi
+if [ ! -e lang_en_$LNG.txt ]; then echo "NG!  file lang_en_$LNG.txt not found!" >&2; exit 1; fi
 echo "OK" >&2
 
 #filter comment and empty lines from key and dictionary files, create temporary files
 echo -n " creating tmp files..." >&2
 cat lang_en.txt | sed "/^$/d;/^#/d" > lang_en.tmp
-cat lang_en_$LANG.txt | sed "/^$/d;/^#/d" > lang_en_$LANG.tmp
+cat lang_en_$LNG.txt | sed "/^$/d;/^#/d" > lang_en_$LNG.tmp
 echo "OK" >&2
-#cat lang_en_$LANG.tmp | sed 'n;d' >test1.txt
+#cat lang_en_$LNG.tmp | sed 'n;d' >test1.txt
 
 #compare files using diff and check for differences
 echo -n " comparing tmp files..." >&2
-if ! cat lang_en_$LANG.tmp | sed 'n;d' | diff lang_en.tmp - > lang_en_$LANG.dif; then
+if ! cat lang_en_$LNG.tmp | sed 'n;d' | diff lang_en.tmp - > lang_en_$LNG.dif; then
  echo "NG!" >&2
- echo "Entries in lang_en_$LANG.txt are different from lang_en.txt!" >&2
- echo "please check lang_en_$LANG.dif" >&2
+ echo "Entries in lang_en_$LNG.txt are different from lang_en.txt!" >&2
+ echo "please check lang_en_$LNG.dif" >&2
  finish 1
 fi
 echo "OK" >&2
 
 #generate lang_xx.txt (secondary language text data sorted by ids)
-echo -n " generating lang_$LANG.txt..." >&2
-cat lang_en_$LANG.tmp | sed '1~2d' | sed "s/^\"\\\\x00/\"/" > lang_$LANG.txt
+echo -n " generating lang_$LNG.txt..." >&2
+cat lang_en_$LNG.tmp | sed '1~2d' | sed "s/^\"\\\\x00/\"/" > lang_$LNG.txt
 echo "OK" >&2
 
 #generate lang_xx.dat (secondary language text data in binary form)
-echo -n " generating lang_$LANG.dat..." >&2
-cat lang_$LANG.txt | sed "s/\\\\/\\\\\\\\/g" | while read s; do
+echo -n " generating lang_$LNG.dat..." >&2
+cat lang_$LNG.txt | sed "s/\\\\/\\\\\\\\/g" | while read s; do
  s=${s#\"}
  s=${s%\"}
  /bin/echo -e -n "$s\x00"
-done >lang_$LANG.dat
+done >lang_$LNG.dat
 echo "OK" >&2
 
 #calculate variables
 lt_magic='\xa5\x5a\xb4\x4b'
-lt_count=$(grep -c '^' lang_$LANG.txt)
-lt_data_size=$(wc -c lang_$LANG.dat | cut -f1 -d' ')
+lt_count=$(grep -c '^' lang_$LNG.txt)
+lt_data_size=$(wc -c lang_$LNG.dat | cut -f1 -d' ')
 lt_offs_size=$((2 * $lt_count))
 lt_size=$((16 + $lt_offs_size + $lt_data_size))
 lt_chsum=0
 lt_code='\xff\xff'
 lt_resv1='\xff\xff\xff\xff'
 
-case "$LANG" in
+case "$LNG" in
  *en*) lt_code='\x6e\x65' ;;
  *cz*) lt_code='\x73\x63' ;;
  *de*) lt_code='\x65\x64' ;;
@@ -100,15 +100,15 @@ case "$LANG" in
 esac
 
 #generate lang_xx.ofs (secondary language text data offset table)
-echo -n " generating lang_$LANG.ofs..." >&2
-cat lang_$LANG.txt | sed "s/\\\\x[0-9a-f][0-9a-f]/\./g;s/\\\\[0-7][0-7][0-7]/\./g" |\
- awk 'BEGIN { o='$((16 + $lt_offs_size))';} { printf("%d\n",o); o+=(length($0)-1); }' > lang_$LANG.ofs
+echo -n " generating lang_$LNG.ofs..." >&2
+cat lang_$LNG.txt | sed "s/\\\\x[0-9a-f][0-9a-f]/\./g;s/\\\\[0-7][0-7][0-7]/\./g" |\
+ awk 'BEGIN { o='$((16 + $lt_offs_size))';} { printf("%d\n",o); o+=(length($0)-1); }' > lang_$LNG.ofs
 echo "OK" >&2
 
 #generate lang_xx.bin (secondary language result binary file)
-echo " generating lang_$LANG.bin:" >&2
+echo " generating lang_$LNG.bin:" >&2
 #create empty file
-dd if=/dev/zero of=lang_$LANG.bin bs=1 count=$lt_size 2>/dev/null
+dd if=/dev/zero of=lang_$LNG.bin bs=1 count=$lt_size 2>/dev/null
 #awk code to format ui16 variables for dd
 awk_ui16='{ h=int($1/256); printf("\\x%02x\\x%02x\n", int($1-256*h), h); }'
 
@@ -116,32 +116,32 @@ awk_ui16='{ h=int($1/256); printf("\\x%02x\\x%02x\n", int($1-256*h), h); }'
 
 echo -n "  writing header (16 bytes)..." >&2
 /bin/echo -n -e "$lt_magic" |\
- dd of=lang_$LANG.bin bs=1 count=4 seek=0 conv=notrunc 2>/dev/null
+ dd of=lang_$LNG.bin bs=1 count=4 seek=0 conv=notrunc 2>/dev/null
 /bin/echo -n -e $(echo -n "$lt_size" | awk "$awk_ui16") |\
- dd of=lang_$LANG.bin bs=1 count=2 seek=4 conv=notrunc 2>/dev/null
+ dd of=lang_$LNG.bin bs=1 count=2 seek=4 conv=notrunc 2>/dev/null
 /bin/echo -n -e $(echo -n "$lt_count" | awk "$awk_ui16") |\
- dd of=lang_$LANG.bin bs=1 count=2 seek=6 conv=notrunc 2>/dev/null
+ dd of=lang_$LNG.bin bs=1 count=2 seek=6 conv=notrunc 2>/dev/null
 /bin/echo -n -e $(echo -n "$lt_chsum" | awk "$awk_ui16") |\
- dd of=lang_$LANG.bin bs=1 count=2 seek=8 conv=notrunc 2>/dev/null
+ dd of=lang_$LNG.bin bs=1 count=2 seek=8 conv=notrunc 2>/dev/null
 /bin/echo -n -e "$lt_code" |\
- dd of=lang_$LANG.bin bs=1 count=2 seek=10 conv=notrunc 2>/dev/null
+ dd of=lang_$LNG.bin bs=1 count=2 seek=10 conv=notrunc 2>/dev/null
 /bin/echo -n -e "$lt_resv1" |\
- dd of=lang_$LANG.bin bs=1 count=4 seek=12 conv=notrunc 2>/dev/null
+ dd of=lang_$LNG.bin bs=1 count=4 seek=12 conv=notrunc 2>/dev/null
 echo "OK" >&2
 
 echo -n "  writing offset table ($lt_offs_size bytes)..." >&2
-/bin/echo -n -e $(cat lang_$LANG.ofs | awk "$awk_ui16" | tr -d '\n'; echo) |\
- dd of=./lang_$LANG.bin bs=1 count=$lt_offs_size seek=16 conv=notrunc 2>/dev/null
+/bin/echo -n -e $(cat lang_$LNG.ofs | awk "$awk_ui16" | tr -d '\n'; echo) |\
+ dd of=./lang_$LNG.bin bs=1 count=$lt_offs_size seek=16 conv=notrunc 2>/dev/null
 echo "OK" >&2
 
 echo -n "  writing text data ($lt_data_size bytes)..." >&2
-dd if=./lang_$LANG.dat of=./lang_$LANG.bin bs=1 count=$lt_data_size seek=$((16 + $lt_offs_size)) conv=notrunc 2>/dev/null
+dd if=./lang_$LNG.dat of=./lang_$LNG.bin bs=1 count=$lt_data_size seek=$((16 + $lt_offs_size)) conv=notrunc 2>/dev/null
 echo "OK" >&2
 
 #calculate and update checksum
-lt_chsum=$(cat lang_$LANG.bin | xxd | cut -c11-49 | tr ' ' "\n" | sed '/^$/d' | awk 'BEGIN { sum = 0; } { sum += strtonum("0x"$1); if (sum > 0xffff) sum -= 0x10000; } END { printf("%x\n", sum); }')
+lt_chsum=$(cat lang_$LNG.bin | xxd | cut -c11-49 | tr ' ' "\n" | sed '/^$/d' | awk 'BEGIN { sum = 0; } { sum += strtonum("0x"$1); if (sum > 0xffff) sum -= 0x10000; } END { printf("%x\n", sum); }')
 /bin/echo -n -e $(echo -n $((0x$lt_chsum)) | awk "$awk_ui16") |\
- dd of=lang_$LANG.bin bs=1 count=2 seek=8 conv=notrunc 2>/dev/null
+ dd of=lang_$LNG.bin bs=1 count=2 seek=8 conv=notrunc 2>/dev/null
 
 echo " lang_table details:" >&2
 echo "  lt_count = $lt_count" >&2
@@ -149,9 +149,9 @@ echo "  lt_size  = $lt_size" >&2
 echo "  lt_chsum = $lt_chsum" >&2
 }
 
-echo $LANG
+echo $LNG
 
-if [ "$LANG" = "all" ]; then
+if [ "$LNG" = "all" ]; then
  make_lang cz
  make_lang de
  make_lang es
@@ -159,7 +159,7 @@ if [ "$LANG" = "all" ]; then
  make_lang pl
  exit 0
 else
- make_lang $LANG
+ make_lang $LNG
 fi
 
 finish 0
diff --git a/lang/po/make_po.sh b/lang/po/make_po.sh
index 881db316..315a2706 100644
--- a/lang/po/make_po.sh
+++ b/lang/po/make_po.sh
@@ -5,11 +5,11 @@
 #
 SRCDIR="../../Firmware"
 #
-LANG=$1
-if [ -z "$LANG" ]; then LANG=cz; fi
+LNG=$1
+if [ -z "$LNG" ]; then LNG=cz; fi
 #
 
-if [ "$LANG" == "all" ]; then
+if [ "$LNG" == "all" ]; then
  ./make_po.sh cz
  ./make_po.sh de
  ./make_po.sh es
@@ -19,13 +19,13 @@ if [ "$LANG" == "all" ]; then
 fi
 
 echo "make_po.sh started" >&2
-echo " selected language=$LANG" >&2
+echo " selected language=$LNG" >&2
 
 #remove output file if exists
-if [ -e lang_$LANG.po ]; then rm lang_$LANG.po; fi
+if [ -e lang_$LNG.po ]; then rm lang_$LNG.po; fi
 
 lang_name=$(\
- case "$LANG" in
+ case "$LNG" in
   *en*) echo "English" ;;
   *cz*) echo "Czech" ;;
   *de*) echo "German" ;;
@@ -35,7 +35,7 @@ lang_name=$(\
  esac)
 
 lang_short=$(\
- case "$LANG" in
+ case "$LNG" in
   *en*) echo "en" ;;
   *cz*) echo "cs" ;;
   *de*) echo "de" ;;
@@ -47,29 +47,29 @@ lang_short=$(\
 po_date=$(date)
 
 #write po header
-echo "# Translation of Prusa-Firmware into $lang_name." > lang_$LANG.po
-echo "#" >> lang_$LANG.po
-echo 'msgid ""' >> lang_$LANG.po
-echo 'msgstr ""' >> lang_$LANG.po
-echo '"MIME-Version: 1.0\n"' >> lang_$LANG.po
-echo '"Content-Type: text/plain; charset=UTF-8\n"' >> lang_$LANG.po
-echo '"Content-Transfer-Encoding: 8bit\n"' >> lang_$LANG.po
-echo '"Language: '$lang_short'\n"' >> lang_$LANG.po
-echo '"Project-Id-Version: Prusa-Firmware\n"' >> lang_$LANG.po
-echo '"POT-Creation-Date: '$po_date'\n"' >> lang_$LANG.po
-echo '"PO-Revision-Date: '$po_date'\n"' >> lang_$LANG.po
-echo '"Language-Team: \n"' >> lang_$LANG.po
-echo '"X-Generator: Poedit 2.0.7\n"' >> lang_$LANG.po
-echo '"X-Poedit-SourceCharset: UTF-8\n"' >> lang_$LANG.po
-echo '"Last-Translator: \n"' >> lang_$LANG.po
-echo '"Plural-Forms: nplurals=3; plural=(n==1) ? 0 : (n>=2 && n<=4) ? 1 : 2;\n"' >> lang_$LANG.po
-echo >> lang_$LANG.po
+echo "# Translation of Prusa-Firmware into $lang_name." > lang_$LNG.po
+echo "#" >> lang_$LNG.po
+echo 'msgid ""' >> lang_$LNG.po
+echo 'msgstr ""' >> lang_$LNG.po
+echo '"MIME-Version: 1.0\n"' >> lang_$LNG.po
+echo '"Content-Type: text/plain; charset=UTF-8\n"' >> lang_$LNG.po
+echo '"Content-Transfer-Encoding: 8bit\n"' >> lang_$LNG.po
+echo '"Language: '$lang_short'\n"' >> lang_$LNG.po
+echo '"Project-Id-Version: Prusa-Firmware\n"' >> lang_$LNG.po
+echo '"POT-Creation-Date: '$po_date'\n"' >> lang_$LNG.po
+echo '"PO-Revision-Date: '$po_date'\n"' >> lang_$LNG.po
+echo '"Language-Team: \n"' >> lang_$LNG.po
+echo '"X-Generator: Poedit 2.0.7\n"' >> lang_$LNG.po
+echo '"X-Poedit-SourceCharset: UTF-8\n"' >> lang_$LNG.po
+echo '"Last-Translator: \n"' >> lang_$LNG.po
+echo '"Plural-Forms: nplurals=3; plural=(n==1) ? 0 : (n>=2 && n<=4) ? 1 : 2;\n"' >> lang_$LNG.po
+echo >> lang_$LNG.po
 
 #list .cpp, .c and .h files
 files=$(ls "$SRCDIR"/*.cpp "$SRCDIR"/*.c "$SRCDIR"/*.h)
 
-num_texts=$(grep '^#' -c ../lang_en_$LANG.txt)
-num_texts_nt=$(grep '^\"\\x00\"' -c ../lang_en_$LANG.txt)
+num_texts=$(grep '^#' -c ../lang_en_$LNG.txt)
+num_texts_nt=$(grep '^\"\\x00\"' -c ../lang_en_$LNG.txt)
 echo " $num_texts texts, $num_texts_nt not translated" >&2
 
 #loop over all messages
@@ -77,7 +77,7 @@ s0=''
 s1=''
 s2=''
 num=1
-cat ../lang_en_$LANG.txt | sed "s/\\\\/\\\\\\\\/g" | while read -r s; do
+cat ../lang_en_$LNG.txt | sed "s/\\\\/\\\\\\\\/g" | while read -r s; do
  if [ "$s" == "" ]; then
   echo "  processing $num of $num_texts" >&2
   if [ "$s0" == "\"\\\\x00\"" ]; then
@@ -103,11 +103,11 @@ cat ../lang_en_$LANG.txt | sed "s/\\\\/\\\\\\\\/g" | while read -r s; do
  s2=$s1
  s1=$s0
  s0=$s
-done >> lang_$LANG.po
+done >> lang_$LNG.po
 
 #replace LF with CRLF
 sync
-sed -i 's/$/\r/' lang_$LANG.po
+sed -i 's/$/\r/' lang_$LNG.po
 
 echo "make_po.sh finished" >&2
 #read
diff --git a/lang/po_new/merge_lang.sh b/lang/po_new/merge_lang.sh
index 0393572e..da7032c1 100644
--- a/lang/po_new/merge_lang.sh
+++ b/lang/po_new/merge_lang.sh
@@ -2,14 +2,14 @@
 #
 #
 
-LANG=$1
-if [ -z "$LANG" ]; then exit -1; fi
+LNG=$1
+if [ -z "$LNG" ]; then exit -1; fi
 
 #convert '\\e' sequencies to 'x1b' and '\\' to '\'
-cat $LANG.po | sed 's/\\\\e/\\x1b/g;s/\\\\/\\/g' > $LANG'_filtered.po'
+cat $LNG.po | sed 's/\\\\e/\\x1b/g;s/\\\\/\\/g' > $LNG'_filtered.po'
 
 #join lines with multi-line string constants
-cat $LANG'_filtered.po' | sed ':a;N;$!ba;s/\x22\n\x22//g' > $LANG'_new.po'
+cat $LNG'_filtered.po' | sed ':a;N;$!ba;s/\x22\n\x22//g' > $LNG'_new.po'
 
 #generate dictionary
 cat ../lang_en.txt | sed 's/\\/\\\\/g' | while read -r s; do
@@ -17,7 +17,7 @@ cat ../lang_en.txt | sed 's/\\/\\\\/g' | while read -r s; do
  if [ "${s:0:1}" = "\"" ]; then
 #  /bin/echo -e "$s"
   s=$(/bin/echo -e "$s")
-  s2=$(grep -F -A1 -B0  "$s" "$LANG"_new.po | tail -n1 | sed 's/^msgstr //')
+  s2=$(grep -F -A1 -B0  "$s" "$LNG"_new.po | tail -n1 | sed 's/^msgstr //')
   if [ -z "$s2" ]; then
    echo '"\x00"'
   else
@@ -25,4 +25,4 @@ cat ../lang_en.txt | sed 's/\\/\\\\/g' | while read -r s; do
   fi
 #  echo
  fi
-done > lang_en_$LANG.txt
+done > lang_en_$LNG.txt
diff --git a/lang/postbuild.sh b/lang/postbuild.sh
index 8ca5b77f..6e9ff870 100644
--- a/lang/postbuild.sh
+++ b/lang/postbuild.sh
@@ -23,8 +23,8 @@ if [ -z "$CONFIG_OK" ]; then eval "$(cat config.sh)"; fi
 if [ -z "$CONFIG_OK" ] | [ $CONFIG_OK -eq 0 ]; then echo 'Config NG!' >&2; exit 1; fi
 #
 # Selected language:
-LANG=$1
-#if [ -z "$LANG" ]; then LANG='cz'; fi
+LNG=$1
+#if [ -z "$LNG" ]; then LNG='cz'; fi
 #
 # Params:
 IGNORE_MISSING_TEXT=1
@@ -99,8 +99,8 @@ echo "OK" >&2
 
 #update _SEC_LANG in binary file if language is selected
 echo -n "  secondary language data..." >&2
-if [ ! -z "$LANG" ]; then
- ./update_lang.sh $LANG 2>./update_lang.out
+if [ ! -z "$LNG" ]; then
+ ./update_lang.sh $LNG 2>./update_lang.out
  if [ $? -ne 0 ]; then echo "NG! - check update_lang.out file" >&2; finish 1; fi
  echo "OK" >&2
  finish 0
diff --git a/lang/update_lang.sh b/lang/update_lang.sh
index b28081b6..cc660463 100644
--- a/lang/update_lang.sh
+++ b/lang/update_lang.sh
@@ -9,8 +9,8 @@ if [ -z "$OBJCOPY" ]; then echo 'variable OBJCOPY not set!' >&2; exit 1; fi
 if [ -z "$CONFIG_OK" ] | [ $CONFIG_OK -eq 0 ]; then echo 'Config NG!' >&2; exit 1; fi
 #
 # Selected language:
-LANG=$1
-if [ -z "$LANG" ]; then LANG='cz'; fi
+LNG=$1
+if [ -z "$LNG" ]; then LNG='cz'; fi
 #
 
 finish()
@@ -28,11 +28,11 @@ finish()
 }
 
 echo "update_lang.sh started" >&2
-echo " selected language=$LANG" >&2
+echo " selected language=$LNG" >&2
 
 echo -n " checking files..." >&2
 if [ ! -e text.sym ]; then echo "NG!  file text.sym not found!" >&2; finish 1; fi
-if [ ! -e lang_$LANG.bin ]; then echo "NG!  file lang_$LANG.bin not found!" >&2; finish 1; fi
+if [ ! -e lang_$LNG.bin ]; then echo "NG!  file lang_$LNG.bin not found!" >&2; finish 1; fi
 if [ ! -e firmware.bin ]; then echo "NG!  file firmware.bin not found!" >&2; finish 1; fi
 echo "OK" >&2
 
@@ -62,17 +62,17 @@ lang_table_size=$((256*$((($sec_lang_size - ($lang_table_addr - $sec_lang_addr))
 printf "  lang_table_size =0x%04x (=%d bytes)\n" $lang_table_size $lang_table_size >&2
 
 #get lang_xx.bin file size
-lang_file_size=$(wc -c lang_$LANG.bin | cut -f1 -d' ')
+lang_file_size=$(wc -c lang_$LNG.bin | cut -f1 -d' ')
 printf "  lang_file_size  =0x%04x (=%d bytes)\n" $lang_file_size $lang_file_size >&2
 
 if [ $lang_file_size -gt $lang_table_size ]; then echo "Lanaguage binary file size too big!" >&2; finish 1; fi
 
 echo "updating 'firmware.bin'..." >&2
 
-dd if=lang_$LANG.bin of=firmware.bin bs=1 seek=$lang_table_addr conv=notrunc 2>/dev/null
+dd if=lang_$LNG.bin of=firmware.bin bs=1 seek=$lang_table_addr conv=notrunc 2>/dev/null
 
 #convert bin to hex
 echo "converting to hex..." >&2
-$OBJCOPY -I binary -O ihex ./firmware.bin ./firmware_$LANG.hex
+$OBJCOPY -I binary -O ihex ./firmware.bin ./firmware_$LNG.hex
 
 finish 0