diff --git a/doc/lgspell.py b/doc/lgspell.py
old mode 100644
new mode 100755
index 6c6cf39d..60617cf6
--- a/doc/lgspell.py
+++ b/doc/lgspell.py
@@ -1,14 +1,21 @@
+#!/usr/bin/env python3
 import re
 
 from enchant.tokenize import Filter
 
+reacronym = re.compile(r'^[A-Z]+s?$')
 reoption = re.compile(r'^[a-z]+:\w+$')
-recamel = re.compile(r'^[a-z]+[A-Z]\w+$')
+recamel = re.compile(r'^[A-Za-z]+[A-Z]\w+$')
 repackage = re.compile(r'^[\w-]+-(?:dev|bin)$|^fonts-[\w-]+-ttf$|^virt-manager$')
-repath = re.compile(r'^/dev/')
+repath = re.compile(r'^/dev/|.*\.\w+$')
 recrypto = re.compile(r'^[13][A-Za-z0-9]{25,34}$|^0x[0-9a-fA-F]{40}$')
 
 
+class AcronymFilter(Filter):
+    def _skip(self, word):
+        return reacronym.match(word)
+
+
 class OptionFilter(Filter):
     def _skip(self, word):
         return reoption.match(word) or recamel.match(word)
@@ -27,3 +34,24 @@ class PathFilter(Filter):
 class CryptoAddressFilter(Filter):
     def _skip(self, word):
         return recrypto.match(word)
+
+
+if __name__ == '__main__':
+    import os
+    import sys
+    from enchant.checker import SpellChecker
+
+    checker = SpellChecker('en_US', sys.stdin.read(), filters=[
+        AcronymFilter, OptionFilter, PackageFilter, PathFilter,
+    ])
+
+    with open(os.path.join(os.path.dirname(__file__), 'words.txt')) as f:
+        for line in f:
+            checker.add(line.strip())
+
+    has_error = False
+    for error in checker:
+        print(f'Spelling error: {error.word}')
+        print(f'Context: {error.leading_context(30)}{error.word}{error.trailing_context(30)}')
+        has_error = True
+    sys.exit(has_error)