diff --git a/lang/fw-clean.sh b/lang/fw-clean.sh
new file mode 100644
index 00000000..a7d34072
--- /dev/null
+++ b/lang/fw-clean.sh
@@ -0,0 +1,61 @@
+#!/bin/sh
+#
+# fw-clean.sh - multi-language support script
+#  Remove all firmware output files from lang folder.
+#
+
+result=0
+
+rm_if_exists()
+{
+ if [ -e $1 ]; then
+  echo -n " removing '$1'..." >&2
+  if rm $1; then
+   echo "OK" >&2
+  else
+   echo "NG!" >&2
+   result=1
+  fi
+ fi
+}
+
+echo "fw-clean.sh started" >&2
+
+rm_if_exists text.sym
+rm_if_exists progmem1.sym
+rm_if_exists progmem1.lss
+rm_if_exists progmem1.hex
+rm_if_exists progmem1.chr
+rm_if_exists progmem1.var
+rm_if_exists progmem1.txt
+rm_if_exists textaddr.txt
+rm_if_exists firmware.bin
+rm_if_exists firmware.hex
+rm_if_exists firmware_cz.hex
+rm_if_exists firmware_de.hex
+rm_if_exists firmware_es.hex
+rm_if_exists firmware_it.hex
+rm_if_exists firmware_pl.hex
+rm_if_exists progmem.out
+rm_if_exists textaddr.out
+rm_if_exists update_lang.out
+rm_if_exists update_lang_cz.out
+rm_if_exists update_lang_de.out
+rm_if_exists update_lang_es.out
+rm_if_exists update_lang_it.out
+rm_if_exists update_lang_pl.out
+rm_if_exists lang.bin
+rm_if_exists lang.hex
+
+echo -n "fw-clean.sh finished" >&2
+if [ $result -eq 0 ]; then
+ echo " with success" >&2
+else
+ echo " with errors!" >&2
+fi
+
+case "$-" in
+ *i*) echo "press enter key"; read ;;
+esac
+
+exit $result
diff --git a/lang/iso639-1.txt b/lang/iso639-1.txt
new file mode 100644
index 00000000..aa6f64e5
--- /dev/null
+++ b/lang/iso639-1.txt
@@ -0,0 +1,10 @@
+#language codes ISO639-1
+# iso english  localized
+#-----------------------
+# en  English  English
+# de  German   Deutsch
+# cs  Czech    Cestina
+# es  Spanish  Espanol
+# fr  
+# it  Italian  Italiano
+# pl  Polish   Polski
diff --git a/lang/lang-build.sh b/lang/lang-build.sh
index c98ee7b6..481929cd 100644
--- a/lang/lang-build.sh
+++ b/lang/lang-build.sh
@@ -90,7 +90,8 @@ generate_binary()
   cat lang_en_$1.txt | sed '/^$/d;/^#/d' | sed -n 'n;p'
  fi | sed 's/^\"\\x00\"$/\"\"/' > lang_$1.tmp
  #create lang_xx.dat (binary text data file)
- cat lang_$1.tmp | sed 's/^\"/printf \"/;s/"$/\\x00\"/' | sh >lang_$1.dat
+# cat lang_$1.tmp | sed 's/^\"/\/bin\/echo -e \"/;s/"$/\\x00\"/' > lang_$1.shx
+ cat lang_$1.tmp | sed 's/^\"/\/bin\/echo -e \"/;s/"$/\\x00\"/' | sh >lang_$1.dat
  #calculate number of strings
  count=$(grep -c '^"' lang_$1.tmp)
  echo "count="$count >&2
@@ -118,8 +119,8 @@ generate_binary()
  /bin/echo -n -e $(echo -n $((0x$chsum)) | awk "$awk_ui16") |\
   dd of=lang_$1.bin bs=1 count=2 seek=8 conv=notrunc 2>/dev/null
  #remove temporary files
- rm -f lang_$1.tmp
- rm -f lang_$1.dat
+# rm -f lang_$1.tmp
+# rm -f lang_$1.dat
 }
 
 if [ -z "$1" ]; then set 'all'; fi
diff --git a/lang/lang-clean.sh b/lang/lang-clean.sh
new file mode 100644
index 00000000..95fc69b8
--- /dev/null
+++ b/lang/lang-clean.sh
@@ -0,0 +1,57 @@
+#!/bin/sh
+#
+# clean.sh - multi-language support script
+#  Remove all language output files from lang folder.
+#
+
+result=0
+
+rm_if_exists()
+{
+ if [ -e $1 ]; then
+  echo -n " removing '$1'..." >&2
+  if rm $1; then
+   echo "OK" >&2
+  else
+   echo "NG!" >&2
+   result=1
+  fi
+ fi
+}
+
+clean_lang()
+{
+ if [ "$1" = "en" ]; then
+  rm_if_exists lang_$1.tmp
+ else
+  rm_if_exists lang_en_$1.tmp
+  rm_if_exists lang_en_$1.dif
+  rm_if_exists lang_$1.ofs
+  rm_if_exists lang_$1.txt
+ fi
+ rm_if_exists lang_$1.bin
+ rm_if_exists lang_$1.dat
+}
+
+echo "lang-clean.sh started" >&2
+
+clean_lang en
+clean_lang cz
+clean_lang de
+clean_lang es
+clean_lang fr
+clean_lang it
+clean_lang pl
+
+echo -n "lang-clean.sh finished" >&2
+if [ $result -eq 0 ]; then
+ echo " with success" >&2
+else
+ echo " with errors!" >&2
+fi
+
+case "$-" in
+ *i*) echo "press enter key" >&2; read ;;
+esac
+
+exit $result
diff --git a/lang/postbuild.sh b/lang/postbuild.sh
index c50b08ec..0d5686b6 100644
--- a/lang/postbuild.sh
+++ b/lang/postbuild.sh
@@ -117,6 +117,11 @@ else
  finish 1
 fi
 
+#convert bin to hex
+echo -n " converting to hex..." >&2
+$OBJCOPY -I binary -O ihex ./firmware.bin ./firmware.hex
+echo "OK" >&2
+
 #update _SEC_LANG in binary file if language is selected
 echo -n "  secondary language data..." >&2
 if [ ! -z "$LNG" ]; then
@@ -154,9 +159,20 @@ else
 # echo "skipped" >&2
 fi
 
-#convert bin to hex
-#echo -n " converting to hex..." >&2
-#$OBJCOPY -I binary -O ihex ./firmware.bin ./firmware.hex
-#echo "OK" >&2
+#create binary file with all languages
+rm -f lang.bin
+if [ -e lang_cz.bin ]; then cat lang_cz.bin >> lang.bin; fi
+if [ -e lang_de.bin ]; then cat lang_de.bin >> lang.bin; fi
+if [ -e lang_es.bin ]; then cat lang_es.bin >> lang.bin; fi
+if [ -e lang_it.bin ]; then cat lang_it.bin >> lang.bin; fi
+if [ -e lang_pl.bin ]; then cat lang_pl.bin >> lang.bin; fi
+
+#convert lang.bin to lang.hex
+echo -n " converting to hex..." >&2
+$OBJCOPY -I binary -O ihex ./lang.bin ./lang.hex
+echo "OK" >&2
+
+#append languages to hex file
+cat ./lang.hex >> firmware.hex
 
 finish 0