diff --git a/changed_files.sh b/changed_files.sh
new file mode 100644
index 00000000..638a18e2
--- /dev/null
+++ b/changed_files.sh
@@ -0,0 +1,26 @@
+# Copyright 2017 Kaspar Schleiser <kaspar@schleiser.de>
+# Copyright 2014 Ludwig Knüpfer <ludwig.knuepfer@fu-berlin.de>
+# Copyright 2014 Hinnerk van Bruinehsen <h.v.bruinehsen@fu-berlin.de>
+# Copyright 2020 Jonathan Demeyer <jona.dem@gmail.com>
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+changed_files() {
+    : ${FILEREGEX:='\.([CcHh])$'}
+    : ${EXCLUDE:=''}
+    : ${DIFFFILTER:='ACMR'}
+
+    DIFFFILTER="--diff-filter=${DIFFFILTER}"
+
+    # select either all or only touched-in-branch files, filter through FILEREGEX
+    if [ -z "${BASE_BRANCH}" ]; then
+        FILES="$(git ls-tree -r --full-tree --name-only HEAD | grep -E ${FILEREGEX})"
+    else
+        FILES="$(git diff ${DIFFFILTER} --name-only ${BASE_BRANCH} | grep -E ${FILEREGEX})"
+    fi
+
+    # filter out negatives
+    echo "${FILES}" | grep -v -E ${EXCLUDE}
+}
diff --git a/check.sh b/check.sh
new file mode 100644
index 00000000..040c33c8
--- /dev/null
+++ b/check.sh
@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+# Copyright 2019 Alexandre Abadie <alexandre.abadie@inria.fr>
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+CODESPELL_CMD="codespell"
+
+if tput colors &> /dev/null && [ "$(tput colors)" -ge 8 ]; then
+    CERROR=$'\033[1;31m'
+    CRESET=$'\033[0m'
+else
+    CERROR=
+    CRESET=
+fi
+
+: "${LWIPBASE:=$(cd $(dirname $0)/; pwd)}"
+cd $LWIPBASE
+
+: "${LWIPTOOLS:=${LWIPBASE}}"
+. "${LWIPTOOLS}"/changed_files.sh
+
+FILEREGEX='\.([CcHh]|sh|py|md|txt)$'
+EXCLUDE='^(./contrib/apps/LwipMibCompiler/Mibs)'
+FILES=$(FILEREGEX=${FILEREGEX} EXCLUDE=${EXCLUDE} changed_files)
+
+if [ -z "${FILES}" ]; then
+    exit 0
+fi
+
+${CODESPELL_CMD} --version &> /dev/null || {
+    printf "%s%s: cannot execute \"%s\"!%s\n" "${CERROR}" "$0" "${CODESPELL_CMD}" "${CRESET}"
+    exit 1
+}
+
+CODESPELL_OPTS="-q 2"  # Disable "WARNING: Binary file"
+CODESPELL_OPTS+=" --check-hidden"
+# Disable false positives "nd  => and, 2nd", "ans => and", "tolen => token",
+# "ofo => of", "WAN => WANT", "mut => must, mutt, moot"
+CODESPELL_OPTS+=" --ignore-words-list=nd,ans,tolen,ofo,wan,mut"
+
+# Filter-out all false positive raising "disabled due to" messages.
+ERRORS=$(${CODESPELL_CMD} ${CODESPELL_OPTS} ${FILES} | grep -ve "disabled due to")
+
+if [ -n "${ERRORS}" ]
+then
+    printf "%sThere are typos in the following files:%s\n\n" "${CERROR}" "${CRESET}"
+    printf "%s\n" "${ERRORS}"
+    # TODO: return 1 when all typos are fixed
+    exit 0
+else
+    exit 0
+fi