diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..353cc3e
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1 @@
+include davtelepot/ietf_language_tags.csv
diff --git a/setup.py b/setup.py
index 4cd1b74..5ba3a94 100644
--- a/setup.py
+++ b/setup.py
@@ -1,20 +1,29 @@
+"""Setup."""
+
 import codecs
 import os
 import re
 import setuptools
 import sys
 
-if sys.version_info < (3,5):
+if sys.version_info < (3, 5):
     raise RuntimeError("Python3.5+ is needed to run async code")
 
 here = os.path.abspath(os.path.dirname(__file__))
 
+
 def read(*parts):
+    """Read file in `part.part.part.part.ext`.
+
+    Start from `here` and follow the path given by `*parts`
+    """
     with codecs.open(os.path.join(here, *parts), 'r') as fp:
         return fp.read()
 
-def find_information(info, *file_paths):
-    version_file = read(*file_paths)
+
+def find_information(info, *file_path_parts):
+    """Read information in file."""
+    version_file = read(*file_path_parts)
     version_match = re.search(
         r"^__{info}__ = ['\"]([^'\"]*)['\"]".format(
             info=info
@@ -26,6 +35,7 @@ def find_information(info, *file_paths):
         return version_match.group(1)
     raise RuntimeError("Unable to find version string.")
 
+
 with open("README.md", "r") as readme_file:
     long_description = readme_file.read()
 
@@ -34,7 +44,10 @@ setuptools.setup(
     version=find_information("version", "davtelepot", "__init__.py"),
     author=find_information("author", "davtelepot", "__init__.py"),
     author_email=find_information("email", "davtelepot", "__init__.py"),
-    description="telepot.aio.Bot convenient subclass, featuring dataset-powered SQLite.",
+    description=(
+        "telepot.aio.Bot convenient subclass, featuring dataset-powered "
+        "SQLite."
+    ),
     license=find_information("license", "davtelepot", "__init__.py"),
     long_description=long_description,
     long_description_content_type="text/markdown",
@@ -52,11 +65,15 @@ setuptools.setup(
         "Development Status :: 3 - Alpha",
         "Framework :: AsyncIO",
         "Intended Audience :: Developers",
-        "License :: OSI Approved :: GNU Lesser General Public License v3 (LGPLv3)",
+        (
+            "License :: OSI Approved :: GNU Lesser General Public License "
+            "v3 (LGPLv3)"
+        ),
         "Natural Language :: English",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3 :: Only",
         "Topic :: Communications :: Chat",
     ],
     keywords='telepot telegram bot python wrapper',
+    include_package_data=True,
 )