diff --git a/installer/languages/json2nsh.py b/installer/languages/json2nsh.py
new file mode 100755
index 000000000..568ab3a02
--- /dev/null
+++ b/installer/languages/json2nsh.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Picard, the next-generation MusicBrainz tagger
+#
+# Copyright (C) 2020 Philipp Wolfer
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+import glob
+import json
+import os.path
+
+import nshutil as nsh
+
+
+def language_from_filename(path):
+    lang = os.path.splitext(os.path.basename(path))[0]
+    return (nsh.code_to_language(lang), lang)
+
+
+def write_langstring(f, language, identifier, text):
+    langstring = nsh.make_langstring(language, identifier, text)
+    f.write(langstring)
+
+
+def main():
+    scriptdir = os.path.dirname(os.path.abspath(__file__))
+    sourcesdir = os.path.join(scriptdir, 'sources')
+
+    for path in glob.glob(os.path.join(sourcesdir, '*.json')):
+        language, language_code = language_from_filename(path)
+        if not language:
+            print(f'Unknown language code "{language_code}", skipping')
+            continue
+        target_file = os.path.join(scriptdir, f'{language}.nsh')
+        with open(path, 'r', encoding='utf-8') as infile:
+            data = json.loads(infile.read())
+            with open(target_file, 'w+', encoding='utf-8') as outfile:
+                for identifier, text in data.items():
+                    write_langstring(outfile, language, identifier, text)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/installer/languages/nsh2json.py b/installer/languages/nsh2json.py
new file mode 100755
index 000000000..4779ae467
--- /dev/null
+++ b/installer/languages/nsh2json.py
@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Picard, the next-generation MusicBrainz tagger
+#
+# Copyright (C) 2020 Philipp Wolfer
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+import glob
+import json
+import os.path
+
+import nshutil as nsh
+
+
+def language_from_filename(path):
+    lang = os.path.splitext(os.path.basename(path))[0]
+    return (lang, nsh.language_to_code(lang))
+
+
+def extract_strings(f):
+    for line in f:
+        parsed = nsh.parse_langstring(line)
+        if parsed:
+            yield parsed
+
+
+def main():
+    scriptdir = os.path.dirname(os.path.abspath(__file__))
+
+    for path in glob.glob(os.path.join(scriptdir, '*.nsh')):
+        language, language_code = language_from_filename(path)
+        if not language_code:
+            print(f'Unknown language "{language}", skipping')
+            continue
+        target_file = os.path.join(scriptdir, 'sources', f'{language_code}.json')
+        with open(path, 'r', encoding='utf-8') as infile:
+            output = {}
+            for identifier, text in extract_strings(infile):
+                output[identifier] = text
+
+            with open(target_file, 'w+', encoding='utf-8') as outfile:
+                outfile.write(json.dumps(output, indent=4))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/installer/languages/nshutil.py b/installer/languages/nshutil.py
new file mode 100644
index 000000000..cd70a3fdd
--- /dev/null
+++ b/installer/languages/nshutil.py
@@ -0,0 +1,107 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Picard, the next-generation MusicBrainz tagger
+#
+# Copyright (C) 2020 Philipp Wolfer
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+import re
+
+
+LANGUAGES = {
+    'Arabic': 'ar',
+    'Catalan': 'ca',
+    'Czech': 'cs',
+    'Danish': 'da',
+    'Dutch': 'nl',
+    'English': 'en',
+    'Estonian': 'et',
+    'Finnish': 'fi',
+    'French': 'fr',
+    'German': 'de',
+    'Greek': 'el',
+    'Hebrew': 'he',
+    'Italian': 'it',
+    'Japanese': 'ja',
+    'Korean': 'ko',
+    'Norwegian': 'nb',
+    'Polish': 'pl',
+    'Portuguese': 'pt',
+    'PortugueseBR': 'pt_BR',
+    'Russian': 'ru',
+    'SimpChinese': 'zh-Hans',
+    'Slovak': 'sk',
+    'Slovenian': 'sl',
+    'Spanish': 'es',
+    'Swedish': 'sv',
+    'TradChinese': 'zh-Hant',
+    'Turkish': 'tr',
+    'Ukrainian': 'uk',
+}
+
+_R_LANGUAGES = dict([(code, name) for name, code in LANGUAGES.items()])
+
+# See https://nsis.sourceforge.io/Docs/Chapter4.html#varstrings
+ESCAPE_CHARS = {
+    r'$\r': '\r',
+    r'$\n': '\n',
+    r'$\t': '\t',
+    r'$\"': '"',
+    r'$\'': "'",
+    r'$\`': '`',
+}
+
+RE_LANGSTRING_LINE = re.compile(r'LangString\s+(?P<identifier>[A-Za-z0-9_]+)\s+\${LANG_[A-Z]+}\s+["\'`](?P<text>.*)["\'`]$')
+
+
+def language_to_code(language):
+    return LANGUAGES.get(language)
+
+
+def code_to_language(language_code):
+    return _R_LANGUAGES.get(language_code)
+
+
+def escape_string(text):
+    for escape, char in ESCAPE_CHARS.items():
+        if char in ("'", "`"):  # No need to escape quotes other than ""
+            continue
+        text = text.replace(char, escape)
+    return text
+
+
+def unescape_string(text):
+    for escape, char in ESCAPE_CHARS.items():
+        text = text.replace(escape, char)
+    return text
+
+
+def parse_langstring(line):
+    match = RE_LANGSTRING_LINE.match(line)
+    if match:
+        return (
+            match.group('identifier'),
+            unescape_string(match.group('text'))
+        )
+    else:
+        return None
+
+
+def make_langstring(language, identifier, text):
+    language = language.upper()
+    text = escape_string(text)
+    return f'LangString {identifier} ${{LANG_{language}}} "{text}"\n'
diff --git a/installer/languages/sources/de.json b/installer/languages/sources/de.json
new file mode 100644
index 000000000..71b0ece12
--- /dev/null
+++ b/installer/languages/sources/de.json
@@ -0,0 +1,16 @@
+{
+    "MsgAlreadyInstalled": "${PRODUCT_NAME} ist bereits installiert. \n\nKlicken Sie \u201eOK\u201c um die vorherige Version zu deinstallieren oder \u201eAbbrechen\u201c um das Update abzubrechen.",
+    "MsgApplicationRunning": "Die Anwendung ${PRODUCT_NAME} wird ausgef\u00fchrt. Bitte schlie\u00dfen und erneut versuchen.",
+    "MsgRequires64Bit": "Diese Version von ${PRODUCT_NAME} erfordert ein 64-bit Windows-System.",
+    "MuiDescriptionRequired": "Installiert ${PRODUCT_NAME} mit den f\u00fcr die Ausf\u00fchrung erforderlichen Dateien.",
+    "MuiDescriptionLang": "Installiert \u00dcbersetzungen von ${PRODUCT_NAME} in verschiedenen Sprachen.",
+    "MuiDescriptionShortcuts": "Installiert Verkn\u00fcpfungen, um ${PRODUCT_NAME} zu starten.",
+    "MuiDescriptionDesktop": "Installiert eine Verkn\u00fcpfung auf dem Desktop.",
+    "MuiDescriptionStarteMenu": "Installiert eine Verkn\u00fcpfung im Startmen\u00fc.",
+    "OptionRemoveSettings": "Einstellungen und pers\u00f6nliche Daten entfernen",
+    "SectionDesktop": "Desktop",
+    "SectionLanguages": "Sprachen",
+    "SectionRequired": "Programmdateien (erforderlich)",
+    "SectionShortcuts": "Verkn\u00fcpfungen",
+    "SectionStartMenu": "Startmen\u00fc"
+}
\ No newline at end of file
diff --git a/installer/languages/sources/en.json b/installer/languages/sources/en.json
new file mode 100644
index 000000000..863c26d68
--- /dev/null
+++ b/installer/languages/sources/en.json
@@ -0,0 +1,16 @@
+{
+    "MsgAlreadyInstalled": "${PRODUCT_NAME} is already installed. \n\nClick \"OK\" to uninstall the previous version or \"Cancel\" to cancel this upgrade.",
+    "MsgApplicationRunning": "The application ${PRODUCT_NAME} is running. Please close it and try again.",
+    "MsgRequires64Bit": "This version of ${PRODUCT_NAME} requires a 64-bit Windows system.",
+    "MuiDescriptionRequired": "Installs ${PRODUCT_NAME} along with the necessary files for it run.",
+    "MuiDescriptionLang": "Installs translations of ${PRODUCT_NAME} in different languages.",
+    "MuiDescriptionShortcuts": "Installs shortcuts to launch ${PRODUCT_NAME}.",
+    "MuiDescriptionDesktop": "Installs a shortcut on the desktop.",
+    "MuiDescriptionStarteMenu": "Installs a shortcut in the Start Menu.",
+    "OptionRemoveSettings": "Remove settings and personal data",
+    "SectionDesktop": "Desktop",
+    "SectionLanguages": "Languages",
+    "SectionRequired": "Program files (required)",
+    "SectionShortcuts": "Shortcuts",
+    "SectionStartMenu": "Start menu"
+}
\ No newline at end of file
diff --git a/installer/languages/sources/fr.json b/installer/languages/sources/fr.json
new file mode 100644
index 000000000..da4b201ca
--- /dev/null
+++ b/installer/languages/sources/fr.json
@@ -0,0 +1,16 @@
+{
+    "MsgAlreadyInstalled": "${PRODUCT_NAME} est d\u00e9j\u00e0 install\u00e9. \n\nCliquez sur \u00ab\u00a0OK\u00a0\u00bb pour d\u00e9sinstaller la version pr\u00e9c\u00e9dente ou \u00ab\u00a0Annuler\u00a0\u00bb pour annuler cette mise \u00e0 jour.",
+    "MsgApplicationRunning": "L\u2019application ${PRODUCT_NAME} est en cours d\u2019ex\u00e9cution. Veuillez la stopper et essayer \u00e0 nouveau.",
+    "MsgRequires64Bit": "Cette version de ${PRODUCT_NAME} requiert un syst\u00e8me Windows 64 bits.",
+    "MuiDescriptionRequired": "Installe ${PRODUCT_NAME} ainsi que les fichiers n\u00e9cessaires \u00e0 son ex\u00e9cution.",
+    "MuiDescriptionLang": "Installe les traductions de ${PRODUCT_NAME} dans diff\u00e9rentes langues.",
+    "MuiDescriptionShortcuts": "Installe les raccourcis pour lancer ${PRODUCT_NAME}.",
+    "MuiDescriptionDesktop": "Installe un raccourci sur le bureau.",
+    "MuiDescriptionStarteMenu": "Installe un raccourci dans le menu D\u00e9marrer.",
+    "OptionRemoveSettings": "Supprimer les pr\u00e9f\u00e9rences et les donn\u00e9es personnelles",
+    "SectionDesktop": "Bureau",
+    "SectionLanguages": "Langues",
+    "SectionRequired": "Fichiers du programme (requis)",
+    "SectionShortcuts": "Raccourcis",
+    "SectionStartMenu": "Menu D\u00e9marrer"
+}
\ No newline at end of file
diff --git a/installer/languages/sources/it.json b/installer/languages/sources/it.json
new file mode 100644
index 000000000..55956eea3
--- /dev/null
+++ b/installer/languages/sources/it.json
@@ -0,0 +1,16 @@
+{
+    "MsgAlreadyInstalled": "${PRODUCT_NAME} \u00e8 gi\u00e0 installato.\n\nFai clic su 'OK' per disinstallare la versione installata o su 'Annulla' per annullare l'aggiornamento.",
+    "MsgApplicationRunning": "L'applicazione ${PRODUCT_NAME} \u00e8 in esecuzione.\nChiudi l'applicazione e riprova.",
+    "MsgRequires64Bit": "Questa versione di ${PRODUCT_NAME} richiede un sistema Windows a 64bit.",
+    "MuiDescriptionRequired": "Installa ${PRODUCT_NAME} e i relativi file necessari alla sua esecuzione.",
+    "MuiDescriptionLang": "Installa le traduzioni di ${PRODUCT_NAME} per le differenti lingue.",
+    "MuiDescriptionShortcuts": "Installa collegamento per eseguire ${PRODUCT_NAME}.",
+    "MuiDescriptionDesktop": "Installa collegamento sul desktop.",
+    "MuiDescriptionStarteMenu": "Installa collegamento nel menu Start.",
+    "OptionRemoveSettings": "Elimina impostazioni e dati personali",
+    "SectionDesktop": "Desktop",
+    "SectionLanguages": "Lingue",
+    "SectionRequired": "File programma (richiesti)",
+    "SectionShortcuts": "Collegamenti",
+    "SectionStartMenu": "Menu Start"
+}
\ No newline at end of file
diff --git a/installer/languages/sources/nl.json b/installer/languages/sources/nl.json
new file mode 100644
index 000000000..6f4d93cd6
--- /dev/null
+++ b/installer/languages/sources/nl.json
@@ -0,0 +1,16 @@
+{
+    "MsgAlreadyInstalled": "${PRODUCT_NAME} is al ge\u00efnstalleerd. \n\nKlik op \u201cOK\u201d om de vorige versie te verwijderen of op \u201cAnnuleren\u201d om de installatie te annuleren.",
+    "MsgApplicationRunning": "De applicatie ${PRODUCT_NAME} is nog actief. Sluit haar af en probeer het opnieuw.",
+    "MsgRequires64Bit": "Voor deze versie van ${PRODUCT_NAME} heb je een 64 bitssysteem nodig.",
+    "MuiDescriptionRequired": "Installeert ${PRODUCT_NAME} en de bestanden die het nodig heeft om te draaien.",
+    "MuiDescriptionLang": "Installeert vertalingen van ${PRODUCT_NAME}.",
+    "MuiDescriptionShortcuts": "Installeert snelkoppelingen om ${PRODUCT_NAME} te starten.",
+    "MuiDescriptionDesktop": "Installeert een snelkoppeling op het bureaublad.",
+    "MuiDescriptionStarteMenu": "Installeert een snelkoppeling in het startmenu.",
+    "OptionRemoveSettings": "Verwijder instellingen en persoonlijke gegevens",
+    "SectionDesktop": "Bureaublad",
+    "SectionLanguages": "Talen",
+    "SectionRequired": "Programmabestanden (vereist)",
+    "SectionShortcuts": "Snelkoppelingen",
+    "SectionStartMenu": "Startmenu"
+}
\ No newline at end of file