diff --git a/Firmware/langtool_EN_CZ_PL.pl b/Firmware/langtool_EN_CZ_PL.pl
new file mode 100644
index 0000000000..5e9d55ac55
--- /dev/null
+++ b/Firmware/langtool_EN_CZ_PL.pl
@@ -0,0 +1,349 @@
+#!/usr/bin/perl
+# Processes language_xx.h files into language.cpp and language.h
+
+use strict;
+use warnings;
+
+my @langs = ("en","cz","pl");
+
+sub parselang 
+{
+    my ($filename) = @_;
+ 	open(my $fh, '<:encoding(UTF-8)', $filename)
+#	open(my $fh, '<', $filename)
+  		or die "Could not open file '$filename' $!";
+  	# Create a new hash reference.
+	my $out = {};
+	while (my $line = <$fh>) {
+		chomp $line;
+		next if (index($line, 'define') == -1 || index($line, 'MSG') == -1);
+		my $modifiers = {};
+    	my $symbol = '';
+    	my $value = '';
+		if (index($line, 'define(') == -1) {
+			# Extended definition, which specifies the string formatting.
+	    	$line =~ /(?is)define\s*(\S*)\s*(.*)/;
+	    	$symbol = "$1";
+	    	$value = $2;
+		} else {
+			$line =~ /(?is)define\((.*)\)\s*(\S*)\s*(.*)/;
+			my $options = $1;
+			foreach my $key_value (split /,/, $options) {
+				if ($key_value =~ /\s*(\S*)\s*=\s*(\S*)\s*/) {
+					${$modifiers}{$1} = $2;
+				}
+			}
+	    	$symbol = "$2";
+	    	$value = $3;
+		}
+    	next if (! defined $symbol or length($symbol) == 0);
+    	# Trim whitespaces from both sides
+    	$value =~ s/^\s+|\s+$//g;
+		#$string =~ s/" MACHINE_NAME "/Prusa i3/;
+		$value =~ s/" FIRMWARE_URL "/https:\/\/github.com\/prusa3d\/Prusa-i3-Plus\//;
+		$value =~ s/" PROTOCOL_VERSION "/1.0/;
+		$value =~ s/" STRINGIFY\(EXTRUDERS\) "/1/;
+		$value =~ s/" MACHINE_UUID "/00000000-0000-0000-0000-000000000000/;
+		${$out}{$symbol} = { value=>$value, %$modifiers };
+	}
+	return $out;
+}
+
+sub pgm_is_whitespace
+{
+	my ($c) = @_;
+	if (! defined($c)) {
+		print "pgm_is_whitespace: undefined\n";
+		exit(1);
+	}
+    return $c == ord(' ') || $c == ord('\t') || $c == ord('\r') || $c == ord('\n');
+}
+
+sub pgm_is_interpunction
+{
+	my ($c) = @_;
+    return $c == ord('.') || $c == ord(',') || $c == ord(':') || $c == ord(';') || $c == ord('?') || $c == ord('!') || $c == ord('/');
+}
+
+sub break_text_fullscreen
+{
+    my $lines = [];
+    my ($text_str, $max_linelen) = @_;
+    if (! defined($text_str) || length($text_str) < 2) {
+    	return $lines;
+	}
+	$text_str =~ s/^"//;
+	$text_str =~ s/([^\\])"/$1/;
+	$text_str =~ s/\\"/"/;
+
+	my @msg = unpack("W*", $text_str);
+    #my @msg = split("", $text_str);
+    my $len = $#msg + 1;
+    my $i = 0;
+
+    LINE: 
+    while ($i < $len) {
+        while ($i < $len && pgm_is_whitespace($msg[$i])) {
+            $i += 1;
+        }
+        if ($i == $len) {
+            # End of the message.
+            last LINE;
+        }
+        my $msgend2 = $i + (($max_linelen > $len) ? $len : $max_linelen);
+        my $msgend = $msgend2;
+        if ($msgend < $len && ! pgm_is_whitespace($msg[$msgend]) && ! pgm_is_interpunction($msg[$msgend])) {
+            # Splitting a word. Find the start of the current word.
+            while ($msgend > $i && ! pgm_is_whitespace($msg[$msgend - 1])) {
+                 $msgend -= 1;
+            }
+            if ($msgend == $i) {
+                # Found a single long word, which cannot be split. Just cut it.
+                $msgend = $msgend2;
+            }
+        }
+        my $outstr = substr($text_str, $i, $msgend - $i);
+        $i = $msgend;
+        $outstr =~ s/~/ /g;
+        #print "Output string: $outstr \n";
+        push @$lines, $outstr;
+    }
+
+    return $lines;
+}
+
+my %texts;
+my %attributes;
+my $num_languages = 0;
+if (1)
+{
+	# First load the common strings.
+	my $symbols = parselang("language_common.h");
+ 	foreach my $key (keys %{$symbols}) {
+ 		if (! (exists $texts{$key})) {
+	 		my $symbol_value = ${$symbols}{$key};
+	 		# Store the symbol value for each language.
+	 		$texts{$key} = [ (${$symbol_value}{value}) x ($#langs+1) ];
+	 		# Store the possible attributes.
+			delete ${$symbol_value}{value};
+			# Store an "is common" attribute.
+			${$symbol_value}{common} = 1;
+			# 4x 80 characters, 4 lines sent over serial line.
+			${$symbol_value}{length} = 320;
+			${$symbol_value}{lines} = 1;
+ 			$attributes{$key} = $symbol_value;
+ 		} else {
+ 			print "Duplicate key in language_common.h: $key\n";
+ 		}
+ 	}
+}
+foreach my $lang (@langs) {
+	my $symbols = parselang("language_$lang.h");
+ 	foreach my $key (keys %{$symbols}) {
+ 		if (! (exists $texts{$key})) {
+	 		$texts{$key} = [];
+ 		}
+ 		my $symbol_value = ${$symbols}{$key};
+ 		my $strings = $texts{$key};
+ 		if (defined $attributes{$key} && defined ${$attributes{$key}}{common} && ${$attributes{$key}}{common} == 1) {
+ 			# Common overrides the possible definintions in the language specific files.
+ 		} else {
+	 		die "Symbol $key defined first in $lang, undefined in the preceding language files."
+	 			if (scalar(@$strings) != $num_languages);
+	 		push @$strings, ${$symbol_value}{value};
+	 		if ($lang eq 'en') {
+	 			# The english texts may contain attributes. Store them into %attributes.
+	 			delete ${$symbol_value}{value};
+	 			$attributes{$key} = $symbol_value;
+	 		}
+	 	}
+ 	}
+ 	$num_languages += 1;
+ 	foreach my $key (keys %texts) {
+ 		my $strings = $texts{$key};
+ 		if (scalar(@$strings) < $num_languages) {
+ 			# die "Symbol $key undefined in $lang."
+ 			print "Symbol $key undefined in language \"$lang\". Using the english variant:\n";
+ 			print "\t", ${$strings}[0], "\n";
+ 			push @$strings, ${$strings}[0];
+ 		}
+ 	}
+}
+
+my $filename = 'language_all.h';
+open(my $fh, '>', $filename) or die "Could not open file '$filename' $!";
+
+# For the programmatic access to the program memory, read
+# http://www.nongnu.org/avr-libc/user-manual/group__avr__pgmspace.html
+
+print $fh <<END
+#ifndef LANGUAGE_ALL_H
+#define LANGUAGE_ALL_H
+
+#include <avr/pgmspace.h>
+// Language indices into their particular symbol tables.
+END
+;
+
+# Export symbolic IDs of languages.
+for my $i (0 .. $#langs) {
+	my $lang = uc $langs[$i];
+	print $fh "#define LANG_ID_$lang $i\n";
+}
+
+print $fh <<END
+// Language is not defined and it shall be selected from the menu.
+#define LANG_ID_FORCE_SELECTION 254
+// Language is not defined on a virgin RAMBo board.
+#define LANG_ID_UNDEFINED 255
+
+// Default language ID, if no language is selected.
+#define LANG_ID_DEFAULT LANG_ID_EN
+
+// Number of languages available in the language table.
+#define LANG_NUM ${num_languages}
+
+// Currectly active language selection.
+extern unsigned char lang_selected;
+
+#define LANG_TABLE_SELECT_EXPLICIT(TABLE, LANG) ((const char*)(pgm_read_ptr(TABLE + (LANG))))
+#define LANG_TABLE_SELECT(TABLE) LANG_TABLE_SELECT_EXPLICIT(TABLE, lang_selected)
+
+END
+;
+
+foreach my $key (sort(keys %texts)) {
+	my $strings = $texts{$key};
+	if (@{$strings} == grep { $_ eq ${$strings}[0] } @{$strings}) {
+		# All strings are English.
+	    print $fh "extern const char* const ${key}_LANG_TABLE[1];\n";
+		print $fh "#define $key LANG_TABLE_SELECT_EXPLICIT(${key}_LANG_TABLE, 0)\n";
+	} else {
+	    print $fh "extern const char* const ${key}_LANG_TABLE[LANG_NUM];\n";
+		print $fh "#define $key LANG_TABLE_SELECT(${key}_LANG_TABLE)\n";
+		print $fh "#define ${key}_EXPLICIT(LANG) LANG_TABLE_SELECT_EXPLICIT(${key}_LANG_TABLE, LANG)\n"
+			if ($key eq "MSG_LANGUAGE_NAME" || $key eq "MSG_LANGUAGE_SELECT");
+	}
+}
+
+print $fh <<END
+
+extern char* CAT2(const char *s1,const char *s2);
+extern char* CAT4(const char *s1,const char *s2,const char *s3,const char *s4);
+
+#endif //LANGUAGE_ALL.H
+END
+;
+close $fh;
+print ".h created\n";
+
+
+
+$filename = 'language_all.cpp';
+open($fh, '>', $filename) or die "Could not open file '$filename' $!";
+
+print $fh <<'END'
+
+#include "Configuration_prusa.h"
+#include "language_all.h"
+
+#define LCD_WIDTH 20
+extern unsigned char lang_selected;
+
+END
+;
+
+my @keys = sort(keys %texts);
+foreach my $key (@keys) {
+	my $strings = $texts{$key};
+	if (@{$strings} == grep { $_ eq ${$strings}[0] } @{$strings}) {
+		# Shrink the array to a single value.
+		$strings = [${$strings}[0]];
+	}
+	for (my $i = 0; $i <= $#{$strings}; $i ++) {
+		my $suffix = uc($langs[$i]);
+		if ($i == 0 || ${$strings}[$i] ne ${$strings}[0]) {
+			print $fh "const char ${key}_${suffix}[] PROGMEM = ${$strings}[$i];\n";
+		}
+	}
+	my $langnum = $#{$strings}+1;
+	if ($langnum == $#langs+1) {
+		$langnum = "LANG_NUM";
+	}
+    print $fh "const char * const ${key}_LANG_TABLE[$langnum] PROGMEM = {\n";
+	for (my $i = 0; $i <= $#{$strings}; $i ++) {
+		my $suffix = uc($langs[$i]);
+		if ($i == 0 || ${$strings}[$i] ne ${$strings}[0]) {
+			print $fh "\t${key}_${suffix}";
+		} else {
+			print $fh "\t${key}_EN";
+		}
+		print $fh ',' if $i < $#{$strings};
+		print $fh "\n";
+	}
+	print $fh "};\n\n";
+}
+
+print $fh <<'END'
+
+char langbuffer[LCD_WIDTH+1];
+char* CAT2(const char *s1,const char *s2) {
+  unsigned char len=0;
+  strncpy_P(langbuffer+len,s1,LCD_WIDTH-len);
+  len+=strlen_P(s1);
+  strncpy_P(langbuffer+len,s2,LCD_WIDTH-len);
+  return langbuffer;
+}
+char* CAT4(const char *s1,const char *s2,const char *s3,const char *s4) {
+  unsigned char len=0;
+  strncpy_P(langbuffer+len,s1,LCD_WIDTH-len);
+  len+=strlen_P(s1);
+  strncpy_P(langbuffer+len,s2,LCD_WIDTH-len);
+  len+=strlen_P(s2);
+  strncpy_P(langbuffer+len,s3,LCD_WIDTH-len);
+  len+=strlen_P(s3);
+  strncpy_P(langbuffer+len,s4,LCD_WIDTH-len);
+  return langbuffer;
+}
+END
+;
+
+print ".cpp created.\nDone!\n";
+
+my $verify_only = 1;
+
+for my $lang (0 .. $#langs) {
+	print "Language: $langs[$lang]\n";
+	foreach my $key (@keys) {
+		my $strings = $texts{$key};
+		my %attrib = %{$attributes{$key}};
+		my $message = ${$strings}[$lang];
+		$message =~ /\S*"(.*)"\S*/;
+		$message = $1;
+		if ($lang == 0 || ${$strings}[0] ne $message) {
+			# If the language is not English, don't show the non-translated message.
+			my $max_nlines = $attrib{lines} // 1;
+			my $max_linelen = $attrib{length} // (($max_nlines > 1) ? 20 : 17);
+#			if (! $verify_only) {
+#				if ($nlines > 1) {
+#					print "Multi-line message: $message. Breaking to $nlines lines:\n";
+#					print "\t$_\n" foreach (@{$lines});
+#				}
+#			}
+			if ($max_nlines <= 1) {
+				my $linelen = length($message);
+				if ($linelen > $max_linelen) {
+					print "Key $key, language $langs[$lang], line length: $linelen, max length: $max_linelen\n";
+					print "\t$message\n";
+				}
+			} else {
+				my $lines = break_text_fullscreen($message, $max_linelen);
+				my $nlines = @{$lines};
+				if ($nlines > $max_nlines) {
+					print "Key $key, language $langs[$lang], lines: $nlines, max lines: $max_nlines\n";
+					print "\t$_\n" foreach (@{$lines});
+				}
+			}
+		}
+	}
+}