The .pot file is added. Hopefully this makes it easy for people to translate it. Of course thiere's not much to translate, but everyt bit helps I guess.

LICENSE

@@ -0,0 +1,14 @@
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+                    Version 2, December 2004
+
+ Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+
+ Everyone is permitted to copy and distribute verbatim or modified
+ copies of this license document, and changing it is allowed as long
+ as the name is changed.
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. You just DO WHAT THE FUCK YOU WANT TO.
+

bashtuner.pot

@@ -0,0 +1,34 @@
+# Bash Tuner, a stringed instrument tuner written in bash
+# Copyright (C) 2018 Storm Dragon
+# This file is distributed under the same license as the Bash Tuner package.
+# Storm Dragon <stormdragon2976@gmail.com>, 2018.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-07-30 23:06-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=CHARSET\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: bashtuner.sh:50
+msgid "Usage: $0 tune_id"
+msgstr ""
+
+#: bashtuner.sh:51
+msgid "Where tune_id is one of"
+msgstr ""
+
+#: bashtuner.sh:57
+msgid "Welcome to Bash Tuner"
+msgstr ""
+
+#: bashtuner.sh:59
+msgid "Select tuning"
+msgstr ""

bashtuner.sh

@@ -49,7 +49,7 @@ flush_keys() {
 show_help() {
   echo "$(eval_gettext "Usage: \$0 tune_id")"
   echo "$(gettext "Where tune_id is one of")"
-  echo "$(eval_gettext "\${!tuning[@]}")"
+  echo "${!tuning[@]}"
 exit 0
 }