diff --git a/tools/conlluCheckProblems.py b/tools/conlluCheckProblems.py
new file mode 100755
index 0000000000000000000000000000000000000000..27a1e8a0cae06d25ff9fad0321ff92b9144e8031
--- /dev/null
+++ b/tools/conlluCheckProblems.py
@@ -0,0 +1,102 @@
+#! /usr/bin/python3
+
+import sys
+
+def printUsageAndExit() :
+  print("USAGE : %s file.conllu mcd"%sys.argv[0], file=sys.stderr)
+  exit(1)
+
+def readMCD(mcdFilename) :
+  mcd = {}
+  for line in open(mcdFilename, "r", encoding="utf8") :
+    clean = line.strip()
+    if len(line) < 2 or line[0] == '#' :
+      continue
+    splited = line.split(' ')
+    if len(splited) != 2 :
+      print("ERROR : invalid mcd line \'%s\'. Aborting"%line, file=sys.stderr)
+      exit(1)
+    mcd[splited[0].strip()] = splited[1].strip()
+
+  return mcd
+
+def errorAndExit(message, sentence) :
+  print(message)
+  for line in sentence :
+    for col in line :
+      print(col,end="\t")
+    print("")
+  exit(1)
+
+def checkSentence(sentence, conllMCD, conllMCDr) :
+  idIndex = int(conllMCDr["ID"])
+  govIndex = int(conllMCDr["GOV"])
+  labelIndex = int(conllMCDr["LABEL"])
+
+  curId = 0
+  curDigit = 1
+  maxId = 0
+  multiWordEmptyNodes = set()
+
+# Verifying IDS
+  for i in range(len(sentence)) :
+    idStr = sentence[i][idIndex]
+    if idStr.isdigit() :
+      curId += 1
+      curDigit = 1
+      maxId = max(maxId, int(idStr))
+      if int(idStr) != curId :
+        errorAndExit("ERROR in IDs :", sentence)
+    elif len(idStr.split('-')) == 2 :
+      curDigit = 1
+      splited = idStr.split('-')
+      multiWordEmptyNodes.add(i)
+      if int(splited[0]) != curId+1 or int(splited[0]) >= int(splited[1]) :
+        errorAndExit("ERROR in IDs :", sentence)
+    elif len(idStr.split('.')) == 2 :
+      multiWordEmptyNodes.add(i)
+      splited = idStr.split('.')
+      if int(splited[0]) != curId or int(splited[1]) != curDigit :
+        errorAndExit("ERROR in IDs :", sentence)
+      curDigit += 1
+    else :
+      errorAndExit("ERROR in IDs :", sentence)
+
+  nbRoot = 0
+# Verifying root
+  for i in range(len(sentence)) :
+    labelStr = sentence[i][labelIndex]
+    if labelStr == "root" :
+      nbRoot += 1
+
+  if nbRoot != 1 :
+    errorAndExit("ERROR %d root in sentence :"%nbRoot, sentence)
+
+# Verifying govs
+  for i in range(len(sentence)) :
+    if i in multiWordEmptyNodes :
+      continue
+    govStr = sentence[i][govIndex]
+    if not govStr.isdigit() :
+      errorAndExit("ERROR line %d gov \'%s\' is not positive integer :"%(i,govStr), sentence)
+    if int(govStr) > maxId :
+      errorAndExit("ERROR line %d gov \'%s\' is out of sentence :"%(i,govStr), sentence)
+
+if __name__ == "__main__" :
+  if len(sys.argv) != 3 :
+    printUsageAndExit()
+
+  conllMCD = readMCD(sys.argv[2])
+  conllMCDr = {v: k for k, v in conllMCD.items()} 
+
+  sentence = []
+
+  for line in open(sys.argv[1], "r", encoding="utf8") :
+    clean = line.strip()
+    if len(clean) == 0 :
+      checkSentence(sentence, conllMCD, conllMCDr)
+      sentence = []
+      continue
+    if clean[0] == '#' :
+      continue
+    sentence.append(clean.split('\t'))