diff --git a/lang/lang-check.py b/lang/lang-check.py
index 539fc96d..7554d269 100755
--- a/lang/lang-check.py
+++ b/lang/lang-check.py
@@ -1,7 +1,6 @@
 #!/usr/bin/env python3
 #
-# Version 1.0.1
-#
+# Version 1.0.2 - Build 37
 #############################################################################
 # Change log:
 #  7 May  2019, Ondrej Tuma, Initial
@@ -13,12 +12,26 @@
 # 23 Apr. 2021, wavexx    , improve
 # 24 Apr. 2021, wavexx    , improve
 # 26 Apr. 2021, 3d-gussner, add character ruler
+# 07 Jan. 2022, 3d-gussner, Check for Syntax errors and exit with error
+#                         , add Build number 'git rev-list --count HEAD lang-check.py'
 #############################################################################
 #
+# Expected syntax of the files, which other scripts depend on
+# 'lang_en.txt'
+# 1st line: '#MSG_'<some text>' c='<max chars in a column>' r='<max rows> ; '#MSG' is mandentory while 'c=' and 'r=' aren't but should be there
+# 2nd line: '"'<origin message used in the source code>'"' ; '"' double quotes at the beginning and end of message are mandentory
+# 3rd line: LF ; Line feed is mandantory between messages
+#
+# 'lang_en_??.txt'
+# 1st line: '#MSG_'<some text>' c='<max chars in a column>' r='<max rows> ; '#MSG' is mandentory while 'c=' and 'r=' aren't but should be there
+# 2nd line: '"'<origin message used in the source code>'"' ; '"' double quotes at the beginning and end of message are mandentory
+# 3rd line: '"'<translated message>'"' ; '"' double quotes at the beginning and end of message are mandentory
+# 4th line: LF ; Line feed is mandantory between messages
+#
 """Check lang files."""
 from argparse import ArgumentParser
 from traceback import print_exc
-from sys import stdout, stderr
+from sys import stdout, stderr, exit
 import textwrap
 import re
 
@@ -99,7 +112,6 @@ def ign_char_first(c):
 def ign_char_last(c):
     return c.isalnum() or c in {'.', "'"}
 
-
 def parse_txt(lang, no_warning, warn_empty):
     """Parse txt file and check strings to display definition."""
     if lang == "en":
@@ -112,9 +124,15 @@ def parse_txt(lang, no_warning, warn_empty):
     lines = 1
     with open(file_path) as src:
         while True:
-            comment = src.readline().split(' ')
-            #print (comment) #Debug
-
+            message = src.readline()
+            #print(message) #Debug
+            #check syntax 1st line starts with `#MSG`
+            if (message[0:4] != '#MSG'):
+                print(red("[E]: Critical syntax error: 1st line doesn't start with #MSG on line %d" % lines))
+                print(red(message))
+                exit(1)
+            #Check if columns and rows are defined
+            comment = message.split(' ')
             #Check if columns and rows are defined
             cols = None
             rows = None
@@ -140,12 +158,46 @@ def parse_txt(lang, no_warning, warn_empty):
                 print(yellow("[W]: Multiple rows with odd number of columns on line %d" % lines))
 
             #Wrap text to 20 chars and rows
-            source = src.readline()[:-1].strip('"')
+            source = src.readline()[:-1] #read whole line
+            #check if 2nd line of origin message beginns and ends with " double quote
+            if (source[0]!="\""):
+                print(red('[E]: Critical syntax error: Missing " at beginning of message in source on line %d' % lines))
+                print(red(source))
+                exit(1)
+            if (source[-1]=="\""):
+                source = source.strip('"') #remove " double quotes from message 
+            else:
+                print(red('[E]: Critical syntax error: Missing " at end of message in source on line %d' % lines))
+                print(red(source))
+                exit(1)
             #print (source) #Debug
-            translation = src.readline()[:-1].strip('"')
+            translation = src.readline()[:-1]#read whole line
+            #check if 3rd line of translation message beginns and ends with " double quote
+            if (translation[0]!="\""):
+                print(red('[E]: Critical syntax error: Missing " at beginning of message in translation on line %d' % lines))
+                print(red(translation))
+                exit(1)
+            if (translation[-1]=="\""):
+                #print ("End ok")
+                translation = translation.strip('"') #remove " double quote from message
+            else:
+                print(red('[E]: Critical syntax error: Missing " at end of message in translation on line %d' % lines))
+                print(red(translation))
+                exit(1)
+            #print (translation)
             if translation == '\\x00':
                 # crude hack to handle intentionally-empty translations
                 translation = ''
+            #check if source is ascii only
+            if source.isascii() == False:
+                print(red('[E]: Critical syntax: Non ascii chars found on line %d' % lines))
+                print(red(source))
+                exit(1)
+            #check if translation is ascii only
+            if translation.isascii() == False:
+                print(red('[E]: Critical syntax: Non ascii chars found on line %d' % lines))
+                print(red(translation))
+                exit(1)
 
             # handle backslash sequences
             source = unescape(source)
@@ -232,8 +284,8 @@ def parse_txt(lang, no_warning, warn_empty):
                 print_source_translation(source, translation,
                                          wrapped_source, wrapped_translation,
                                          rows, cols)
-
             if len(src.readline()) != 1:  # empty line
+                print(red('[E]: Critical Syntax error: Missing empty line between messages between lines: %d and %d' % (lines+3,lines+4)))
                 break
             lines += 4
     print(green("End %s lang-check" % lang))