diff --git a/.codespellrc b/.codespellrc
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+++ b/.codespellrc
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+[codespell]
+
+# Skip all translation files and a few other autogenerated files.
+# The autotool files should have their typos fixed in the upstream, but
+# until then we will blacklist them here.
+skip = *.po,*.pot,./po4a/man,./doc/api,./configure,./autom4te.cache,./m4/libtool.m4,./build-aux/depcomp,./build-aux/ltmain.sh,./build-aux/config.guess,./build-aux/config.rpath,./m4/po.m4,./build-aux/config.sub
+
+# Ignore false positive matching words. Ideally codespell would allow
+# ignoring words for specific files, but that does not appear to be
+# supported. Instead we need to hope we do not make these typos.
+# Additionally, the ignored words must be specified lower-case even though
+# some of the false positives only occurred upper-case.
+# ANS - used as a variable name in xzmore.in.
+# bu - groff syntax for creating a bullet list item, used in xz.1.
+# te - groff syntax, used in xz.1.
+# caf - command line options for tar example, used in xz.1.
+ignore-words-list = ans,bu,te,caf
+
+# Add extra dictionaries to help improvement comments, docs, etc.
+builtin = clear,rare,informal,usage,names
+
+# Always default to highest interactive level to avoid accidentally
+# changing a false positive or picking the wrong replacement.
+interactive = 3