diff --git a/.gitignore b/.gitignore
index 5e6b34154..e85ad96de 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,6 +23,7 @@ build/
 coverage.xml
 dist/
 installer/picard-setup.nsi
+installer/i18n/out/*.nsh
 locale/
 org.musicbrainz.Picard.appdata.xml
 picard.egg-info
diff --git a/.tx/config b/.tx/config
index 39904eb41..7bb5bad67 100644
--- a/.tx/config
+++ b/.tx/config
@@ -15,6 +15,12 @@ source_file = po/appstream/picard-appstream.pot
 source_lang = en
 type = PO
 
+[musicbrainz.picard_installer]
+file_filter = installer/i18n/sources/<lang>.json
+source_file = installer/i18n/sources/en.json
+source_lang = en
+type = KEYVALUEJSON
+
 [musicbrainz.countries]
 file_filter = po/countries/<lang>.po
 source_file = po/countries/countries.pot
diff --git a/RELEASING.md b/RELEASING.md
index f974f4e84..496ad1753 100644
--- a/RELEASING.md
+++ b/RELEASING.md
@@ -52,7 +52,7 @@ git ls-tree --full-tree -r HEAD --name-only |while read f; do sed -i '1s/^\xEF\x
 ## Get latest translations from Transifex
 
 ```bash
-python setup.py get_po_files && git diff --quiet || git commit -m 'Update .po files' -- po/
+python setup.py pull_translations && git diff --quiet || git commit -m 'Update .po files' -- po/
 ```
 
 ## Synchronize generated consts
diff --git a/installer/i18n/json2nsh.py b/installer/i18n/json2nsh.py
new file mode 100755
index 000000000..831e14566
--- /dev/null
+++ b/installer/i18n/json2nsh.py
@@ -0,0 +1,74 @@
+#!/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 merge_translations(*translations):
+    merged = {}
+    for trans in translations:
+        for k, v in trans.items():
+            if v:
+                merged[k] = v
+    return merged
+
+
+def main():
+    scriptdir = os.path.dirname(os.path.abspath(__file__))
+    sourcesdir = os.path.join(scriptdir, 'sources')
+    outdir = os.path.join(scriptdir, 'out')
+    os.makedirs(outdir, exist_ok=True)
+
+    # Read the english sources for defaults
+    with open(os.path.join(sourcesdir, 'en.json'), 'r', encoding='utf-8') as infile:
+        data_en = json.loads(infile.read())
+
+    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(outdir, f'{language}.nsh')
+        print(f'{path} => {target_file}')
+        with open(path, 'r', encoding='utf-8') as infile:
+            data = json.loads(infile.read())
+            data = merge_translations(data_en, data)
+            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/i18n/nsh2json.py b/installer/i18n/nsh2json.py
new file mode 100755
index 000000000..2f18d3920
--- /dev/null
+++ b/installer/i18n/nsh2json.py
@@ -0,0 +1,63 @@
+#!/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__))
+    sourcesdir = os.path.join(scriptdir, 'sources')
+    outdir = os.path.join(scriptdir, 'out')
+
+    for path in glob.glob(os.path.join(outdir, '*.nsh')):
+        language, language_code = language_from_filename(path)
+        if not language_code:
+            print(f'Unknown language "{language}", skipping')
+            continue
+        target_file = os.path.join(sourcesdir, f'{language_code}.json')
+        print(f'{path} => {target_file}')
+        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, ensure_ascii=False, indent=4))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/installer/i18n/nshutil.py b/installer/i18n/nshutil.py
new file mode 100644
index 000000000..c9a71cb8d
--- /dev/null
+++ b/installer/i18n/nshutil.py
@@ -0,0 +1,150 @@
+#!/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
+
+
+# See list of available NSIS languages at
+# https://sourceforge.net/p/nsis/code/HEAD/tree/NSIS/trunk/Contrib/Language%20files/
+LANGUAGES = {
+    'Afrikaans': 'af',
+    'Albanian': 'sq',
+    'Arabic': 'ar',
+    'Asturian': 'ast',
+    'Basque': 'eu',
+    'Belarusian': 'be',
+    'Bosnian': 'bs',
+    'Breton': 'br',
+    'Bulgarian': 'bg',
+    'Catalan': 'ca',
+    'Cibemba': 'bem',
+    'Corsican': 'co',
+    'Croation': 'hr',
+    'Czech': 'cs',
+    'Danish': 'da',
+    'Dutch': 'nl',
+    'English': 'en',
+    'Esperanto': 'eo',
+    'Estonian': 'et',
+    'Farsi': 'fa',
+    'Finnish': 'fi',
+    'French': 'fr',
+    'Galician': 'gl',
+    'Georgian': 'ka',
+    'German': 'de',
+    'Greek': 'el',
+    'Hebrew': 'he',
+    'Hindi': 'hi',
+    'Hungarian': 'hu',
+    'Icelandic': 'is',
+    'Igbo': 'ig',
+    'Indonesian': 'id',
+    'Irish': 'ga',
+    'Italian': 'it',
+    'Japanese': 'ja',
+    'Khmer': 'km',
+    'Korean': 'ko',
+    'Kurdish': 'ku',
+    'Latvian': 'lv',
+    'Lithuanian': 'lt',
+    'Luxembourgish': 'lb',
+    'Macedonian': 'mk',
+    'Malagasy': 'mg',
+    'Malay': 'ms_MY',
+    'Mongolian': 'mn',
+    'Norwegian': 'nb',
+    'NorwegianNynorsk': 'nn',
+    'Polish': 'pl',
+    'Portuguese': 'pt',
+    'PortugueseBR': 'pt_BR',
+    'Romanian': 'ro',
+    'Russian': 'ru',
+    'ScotsGaelic': 'sco',
+    'Serbian': 'sr',
+    'SimpChinese': 'zh-Hans',
+    'Slovak': 'sk',
+    'Slovenian': 'sl',
+    'Spanish': 'es',
+    'Swahili': 'sw',
+    'Swedish': 'sv',
+    'Tatar': 'tt',
+    'Thai': 'th',
+    'TradChinese': 'zh-Hant',
+    'Turkish': 'tr',
+    'Ukrainian': 'uk',
+    'Uzbek': 'uz',
+    'Vietnamese': 'vi',
+    'Welsh': 'cy',
+    'Yoruba': 'yo',
+}
+
+_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} ${{LANG_{language}}} "{text}"\n'
diff --git a/installer/i18n/sources/de.json b/installer/i18n/sources/de.json
new file mode 100644
index 000000000..180f347f2
--- /dev/null
+++ b/installer/i18n/sources/de.json
@@ -0,0 +1,16 @@
+{
+    "MsgAlreadyInstalled": "${PRODUCT_NAME} ist bereits installiert. \n\nKlicken Sie „OK“ um die vorherige Version zu deinstallieren oder „Abbrechen“ um das Update abzubrechen.",
+    "MsgApplicationRunning": "Die Anwendung ${PRODUCT_NAME} wird ausgeführt. Bitte schließen und erneut versuchen.",
+    "MsgRequires64Bit": "Diese Version von ${PRODUCT_NAME} erfordert ein 64-bit Windows-System.",
+    "MuiDescriptionRequired": "Installiert ${PRODUCT_NAME} mit den für die Ausführung erforderlichen Dateien.",
+    "MuiDescriptionLang": "Installiert Übersetzungen von ${PRODUCT_NAME} in verschiedenen Sprachen.",
+    "MuiDescriptionShortcuts": "Installiert Verknüpfungen, um ${PRODUCT_NAME} zu starten.",
+    "MuiDescriptionDesktop": "Installiert eine Verknüpfung auf dem Desktop.",
+    "MuiDescriptionStarteMenu": "Installiert eine Verknüpfung im Startmenü.",
+    "OptionRemoveSettings": "Einstellungen und persönliche Daten entfernen",
+    "SectionDesktop": "Desktop",
+    "SectionLanguages": "Sprachen",
+    "SectionRequired": "Programmdateien (erforderlich)",
+    "SectionShortcuts": "Verknüpfungen",
+    "SectionStartMenu": "Startmenü"
+}
\ No newline at end of file
diff --git a/installer/i18n/sources/en.json b/installer/i18n/sources/en.json
new file mode 100644
index 000000000..863c26d68
--- /dev/null
+++ b/installer/i18n/sources/en.json
@@ -0,0 +1,16 @@
+{
+    "MsgAlreadyInstalled": "${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 ${PRODUCT_NAME}.",
+    "MuiDescriptionDesktop": "Installs a shortcut on the desktop.",
+    "MuiDescriptionStarteMenu": "Installs a shortcut in the Start Menu.",
+    "OptionRemoveSettings": "Remove settings and personal data",
+    "SectionDesktop": "Desktop",
+    "SectionLanguages": "Languages",
+    "SectionRequired": "Program files (required)",
+    "SectionShortcuts": "Shortcuts",
+    "SectionStartMenu": "Start menu"
+}
\ No newline at end of file
diff --git a/installer/i18n/sources/es.json b/installer/i18n/sources/es.json
new file mode 100644
index 000000000..9de0c099d
--- /dev/null
+++ b/installer/i18n/sources/es.json
@@ -0,0 +1,16 @@
+{
+    "MsgAlreadyInstalled": "${PRODUCT_NAME} ya está instalado . \n\nClick \"OK\" para desinstalar la versión anterior o \"Cancel\" para cancelar esta actualización. ",
+    "MsgApplicationRunning": "La aplicación ${PRODUCT_NAME} está en marcha. Por favor cierrelo e inténtelo de nuevo.",
+    "MsgRequires64Bit": "La versión de ${PRODUCT_NAME} requiere un Windows de 64-bits.",
+    "MuiDescriptionRequired": "Instalar ${PRODUCT_NAME} junto con los archivos necesarios para que funcione.",
+    "MuiDescriptionLang": "Instalar traducciones de ${PRODUCT_NAME} en diferentes lenguajes.",
+    "MuiDescriptionShortcuts": "Instalar atajos para iniciar ${PRODUCT_NAME}.",
+    "MuiDescriptionDesktop": "Instalar un atajo en el escritorio",
+    "MuiDescriptionStarteMenu": "Instalar un atajo en el Menú de Inicio",
+    "OptionRemoveSettings": "Remover ajustes e información personal",
+    "SectionDesktop": "Escritorio",
+    "SectionLanguages": "Idiomas",
+    "SectionRequired": "Archivos de programa (requerido)",
+    "SectionShortcuts": "Atajos",
+    "SectionStartMenu": "Menú de inicio"
+}
\ No newline at end of file
diff --git a/installer/i18n/sources/fr.json b/installer/i18n/sources/fr.json
new file mode 100644
index 000000000..1d84a813f
--- /dev/null
+++ b/installer/i18n/sources/fr.json
@@ -0,0 +1,16 @@
+{
+    "MsgAlreadyInstalled": "${PRODUCT_NAME} est déjà installé. \n\nCliquez sur « OK » pour désinstaller la version précédente ou « Annuler » pour annuler cette mise à jour.",
+    "MsgApplicationRunning": "L’application ${PRODUCT_NAME} est en cours d’exécution. Veuillez la stopper et essayer à nouveau.",
+    "MsgRequires64Bit": "Cette version de ${PRODUCT_NAME} requiert un système Windows 64 bits.",
+    "MuiDescriptionRequired": "Installe ${PRODUCT_NAME} ainsi que les fichiers nécessaires à son exécution.",
+    "MuiDescriptionLang": "Installe les traductions de ${PRODUCT_NAME} dans différentes langues.",
+    "MuiDescriptionShortcuts": "Installe les raccourcis pour lancer ${PRODUCT_NAME}.",
+    "MuiDescriptionDesktop": "Installe un raccourci sur le bureau.",
+    "MuiDescriptionStarteMenu": "Installe un raccourci dans le menu Démarrer.",
+    "OptionRemoveSettings": "Supprimer les préférences et les données personnelles",
+    "SectionDesktop": "Bureau",
+    "SectionLanguages": "Langues",
+    "SectionRequired": "Fichiers du programme (requis)",
+    "SectionShortcuts": "Raccourcis",
+    "SectionStartMenu": "Menu Démarrer"
+}
\ No newline at end of file
diff --git a/installer/i18n/sources/it.json b/installer/i18n/sources/it.json
new file mode 100644
index 000000000..564334a6c
--- /dev/null
+++ b/installer/i18n/sources/it.json
@@ -0,0 +1,16 @@
+{
+    "MsgAlreadyInstalled": "${PRODUCT_NAME} è già installato.\n\nFai clic su 'OK' per disinstallare la versione installata o su 'Annulla' per annullare l'aggiornamento.",
+    "MsgApplicationRunning": "L'applicazione ${PRODUCT_NAME} è 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 collegamenti per eseguire ${PRODUCT_NAME}.",
+    "MuiDescriptionDesktop": "Installa collegamento sul desktop.",
+    "MuiDescriptionStarteMenu": "Installa collegamento nel menu Start.",
+    "OptionRemoveSettings": "Elimina impostazioni e dati personali",
+    "SectionDesktop": "Desktop",
+    "SectionLanguages": "Lingue",
+    "SectionRequired": "File programma (richiesti)",
+    "SectionShortcuts": "Collegamenti",
+    "SectionStartMenu": "Menu Start"
+}
\ No newline at end of file
diff --git a/installer/i18n/sources/nl.json b/installer/i18n/sources/nl.json
new file mode 100644
index 000000000..9b182911a
--- /dev/null
+++ b/installer/i18n/sources/nl.json
@@ -0,0 +1,16 @@
+{
+    "MsgAlreadyInstalled": "${PRODUCT_NAME} is al geïnstalleerd. \n\nKlik op “OK” om de vorige versie te verwijderen of op “Annuleren” 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
diff --git a/installer/languages/Dutch.nsh b/installer/languages/Dutch.nsh
deleted file mode 100644
index 293d36c46..000000000
--- a/installer/languages/Dutch.nsh
+++ /dev/null
@@ -1,14 +0,0 @@
-LangString MsgAlreadyInstalled ${LANG_DUTCH} '${PRODUCT_NAME} is al geïnstalleerd. $\n$\nKlik op “OK” om de vorige versie te verwijderen of op “Annuleren” om de installatie te annuleren.'
-LangString MsgApplicationRunning ${LANG_DUTCH} "De applicatie ${PRODUCT_NAME} is nog actief. Sluit haar af en probeer het opnieuw."
-LangString MsgRequires64Bit ${LANG_DUTCH} "Voor deze versie van ${PRODUCT_NAME} heb je een 64 bitssysteem nodig."
-LangString MuiDescriptionRequired ${LANG_DUTCH} "Installeert ${PRODUCT_NAME} en de bestanden die het nodig heeft om te draaien."
-LangString MuiDescriptionLang ${LANG_DUTCH} "Installeert vertalingen van ${PRODUCT_NAME}."
-LangString MuiDescriptionShortcuts ${LANG_DUTCH} "Installeert snelkoppelingen om ${PRODUCT_NAME} te starten."
-LangString MuiDescriptionDesktop ${LANG_DUTCH} "Installeert een snelkoppeling op het bureaublad."
-LangString MuiDescriptionStarteMenu ${LANG_DUTCH} "Installeert een snelkoppeling in het startmenu."
-LangString OptionRemoveSettings ${LANG_DUTCH} "Verwijder instellingen en persoonlijke gegevens"
-LangString SectionDesktop ${LANG_DUTCH} "Bureaublad"
-LangString SectionLanguages ${LANG_DUTCH} "Talen"
-LangString SectionRequired ${LANG_DUTCH} "Programmabestanden (vereist)"
-LangString SectionShortcuts ${LANG_DUTCH} "Snelkoppelingen"
-LangString SectionStartMenu ${LANG_DUTCH} "Startmenu"
diff --git a/installer/languages/English.nsh b/installer/languages/English.nsh
deleted file mode 100644
index d2d9f5ea1..000000000
--- a/installer/languages/English.nsh
+++ /dev/null
@@ -1,14 +0,0 @@
-LangString MsgAlreadyInstalled ${LANG_ENGLISH} '${PRODUCT_NAME} is already installed. $\n$\nClick "OK" to uninstall the previous version or "Cancel" to cancel this upgrade.'
-LangString MsgApplicationRunning ${LANG_ENGLISH} "The application ${PRODUCT_NAME} is running. Please close it and try again."
-LangString MsgRequires64Bit ${LANG_ENGLISH} "This version of ${PRODUCT_NAME} requires a 64-bit Windows system."
-LangString MuiDescriptionRequired ${LANG_ENGLISH} "Installs ${PRODUCT_NAME} along with the necessary files for it run."
-LangString MuiDescriptionLang ${LANG_ENGLISH} "Installs translations of ${PRODUCT_NAME} in different languages."
-LangString MuiDescriptionShortcuts ${LANG_ENGLISH} "Installs shortcuts to launch ${PRODUCT_NAME}."
-LangString MuiDescriptionDesktop ${LANG_ENGLISH} "Installs a shortcut on the desktop."
-LangString MuiDescriptionStarteMenu ${LANG_ENGLISH} "Installs a shortcut in the Start Menu."
-LangString OptionRemoveSettings ${LANG_ENGLISH} "Remove settings and personal data"
-LangString SectionDesktop ${LANG_ENGLISH} "Desktop"
-LangString SectionLanguages ${LANG_ENGLISH} "Languages"
-LangString SectionRequired ${LANG_ENGLISH} "Program files (required)"
-LangString SectionShortcuts ${LANG_ENGLISH} "Shortcuts"
-LangString SectionStartMenu ${LANG_ENGLISH} "Start menu"
diff --git a/installer/languages/French.nsh b/installer/languages/French.nsh
deleted file mode 100644
index 2d2dcbe97..000000000
--- a/installer/languages/French.nsh
+++ /dev/null
@@ -1,14 +0,0 @@
-LangString MsgAlreadyInstalled ${LANG_FRENCH} '${PRODUCT_NAME} est déjà installé. $\n$\nCliquez sur « OK » pour désinstaller la version précédente ou « Annuler » pour annuler cette mise à jour.'
-LangString MsgApplicationRunning ${LANG_FRENCH} "L’application ${PRODUCT_NAME} est en cours d’exécution. Veuillez la stopper et essayer à nouveau."
-LangString MsgRequires64Bit ${LANG_FRENCH} "Cette version de ${PRODUCT_NAME} requiert un système Windows 64 bits."
-LangString MuiDescriptionRequired ${LANG_FRENCH} "Installe ${PRODUCT_NAME} ainsi que les fichiers nécessaires à son exécution."
-LangString MuiDescriptionLang ${LANG_FRENCH} "Installe les traductions de ${PRODUCT_NAME} dans différentes langues."
-LangString MuiDescriptionShortcuts ${LANG_FRENCH} "Installe les raccourcis pour lancer ${PRODUCT_NAME}."
-LangString MuiDescriptionDesktop ${LANG_FRENCH} "Installe un raccourci sur le bureau."
-LangString MuiDescriptionStarteMenu ${LANG_FRENCH} "Installe un raccourci dans le menu Démarrer."
-LangString OptionRemoveSettings ${LANG_FRENCH} "Supprimer les préférences et les données personnelles"
-LangString SectionDesktop ${LANG_FRENCH} "Bureau"
-LangString SectionLanguages ${LANG_FRENCH} "Langues"
-LangString SectionRequired ${LANG_FRENCH} "Fichiers du programme (requis)"
-LangString SectionShortcuts ${LANG_FRENCH} "Raccourcis"
-LangString SectionStartMenu ${LANG_FRENCH} "Menu Démarrer"
diff --git a/installer/languages/German.nsh b/installer/languages/German.nsh
deleted file mode 100644
index 0a16e4c7f..000000000
--- a/installer/languages/German.nsh
+++ /dev/null
@@ -1,14 +0,0 @@
-LangString MsgAlreadyInstalled ${LANG_GERMAN} "${PRODUCT_NAME} ist bereits installiert. $\n$\nKlicken Sie „OK“ um die vorherige Version zu deinstallieren oder „Abbrechen“ um das Update abzubrechen."
-LangString MsgApplicationRunning ${LANG_GERMAN} "Die Anwendung ${PRODUCT_NAME} wird ausgeführt. Bitte schließen und erneut versuchen."
-LangString MsgRequires64Bit ${LANG_GERMAN} "Diese Version von ${PRODUCT_NAME} erfordert ein 64-bit Windows-System."
-LangString MuiDescriptionRequired ${LANG_GERMAN} "Installiert ${PRODUCT_NAME} mit den für die Ausführung erforderlichen Dateien."
-LangString MuiDescriptionLang ${LANG_GERMAN} "Installiert Übersetzungen von ${PRODUCT_NAME} in verschiedenen Sprachen."
-LangString MuiDescriptionShortcuts ${LANG_GERMAN} "Installiert Verknüpfungen, um ${PRODUCT_NAME} zu starten."
-LangString MuiDescriptionDesktop ${LANG_GERMAN} "Installiert eine Verknüpfung auf dem Desktop."
-LangString MuiDescriptionStarteMenu ${LANG_GERMAN} "Installiert eine Verknüpfung im Startmenü."
-LangString OptionRemoveSettings ${LANG_GERMAN} "Einstellungen und persönliche Daten entfernen"
-LangString SectionDesktop ${LANG_GERMAN} "Desktop"
-LangString SectionLanguages ${LANG_GERMAN} "Sprachen"
-LangString SectionRequired ${LANG_GERMAN} "Programmdateien (erforderlich)"
-LangString SectionShortcuts ${LANG_GERMAN} "Verknüpfungen"
-LangString SectionStartMenu ${LANG_GERMAN} "Startmenü"
diff --git a/installer/languages/Italian.nsh b/installer/languages/Italian.nsh
deleted file mode 100644
index 4bcbb3440..000000000
--- a/installer/languages/Italian.nsh
+++ /dev/null
@@ -1,14 +0,0 @@
-LangString MsgAlreadyInstalled ${LANG_ITALIAN} "${PRODUCT_NAME} è già installato.$\n$\nFai clic su 'OK' per disinstallare la versione installata o su 'Annulla' per annullare l'aggiornamento."
-LangString MsgApplicationRunning ${LANG_ITALIAN} "L'applicazione ${PRODUCT_NAME} è in esecuzione.$\nChiudi l'applicazione e riprova."
-LangString MsgRequires64Bit ${LANG_ITALIAN} "Questa versione di ${PRODUCT_NAME} richiede un sistema Windows a 64bit."
-LangString MuiDescriptionRequired ${LANG_ITALIAN} "Installa ${PRODUCT_NAME} e i relativi file necessari alla sua esecuzione."
-LangString MuiDescriptionLang ${LANG_ITALIAN} "Installa le traduzioni di ${PRODUCT_NAME} per le differenti lingue."
-LangString MuiDescriptionShortcuts ${LANG_ITALIAN} "Installa collegamento per eseguire ${PRODUCT_NAME}."
-LangString MuiDescriptionDesktop ${LANG_ITALIAN} "Installa collegamento sul desktop."
-LangString MuiDescriptionStarteMenu ${LANG_ITALIAN} "Installa collegamento nel menu Start."
-LangString OptionRemoveSettings ${LANG_ITALIAN} "Elimina impostazioni e dati personali"
-LangString SectionDesktop ${LANG_ITALIAN} "Desktop"
-LangString SectionLanguages ${LANG_ITALIAN} "Lingue"
-LangString SectionRequired ${LANG_ITALIAN} "File programma (richiesti)"
-LangString SectionShortcuts ${LANG_ITALIAN} "Collegamenti"
-LangString SectionStartMenu ${LANG_ITALIAN} "Menu Start"
diff --git a/installer/picard-setup.nsi.in b/installer/picard-setup.nsi.in
index 0587ffd1e..16e40c5ed 100644
--- a/installer/picard-setup.nsi.in
+++ b/installer/picard-setup.nsi.in
@@ -80,7 +80,7 @@ ReserveFile "${NSISDIR}\Plugins\x86-unicode\InstallOptions.dll"
 ; Language handling
 !macro LOAD_LANGUAGE LANGUAGE
   !insertmacro MUI_LANGUAGE "${LANGUAGE}"
-  !include "languages\${LANGUAGE}.nsh"
+  !include "i18n\out\${LANGUAGE}.nsh"
 !macroend
 
 ; Language files
@@ -107,7 +107,7 @@ ReserveFile "${NSISDIR}\Plugins\x86-unicode\InstallOptions.dll"
 ; !insertmacro LOAD_LANGUAGE "SimpChinese"
 ; !insertmacro LOAD_LANGUAGE "Slovak"
 ; !insertmacro LOAD_LANGUAGE "Slovenian"
-; !insertmacro LOAD_LANGUAGE "Spanish"
+!insertmacro LOAD_LANGUAGE "Spanish"
 ; !insertmacro LOAD_LANGUAGE "Swedish"
 ; !insertmacro LOAD_LANGUAGE "TradChinese"
 ; !insertmacro LOAD_LANGUAGE "Turkish"
diff --git a/po/README.md b/po/README.md
index a516c1208..ed29107da 100644
--- a/po/README.md
+++ b/po/README.md
@@ -45,13 +45,13 @@ To fetch latest translations from Transifex
 Use the following command:
 
 ```bash
-$ python setup.py get_po_files
+$ python setup.py pull_translations
 ```
 
 It will fetch all po files from Transifex, but the most incomplete ones.
 
 The minimum acceptable percentage of a translation in order to download it can be seen using:
 ```bash
-$ python setup.py get_po_files --help
+$ python setup.py pull_translations --help
 ```
 The percentage value is passed to the `tx pull` command.
diff --git a/setup.py b/setup.py
index fb1ed1b72..daf289f44 100644
--- a/setup.py
+++ b/setup.py
@@ -274,6 +274,9 @@ class picard_build(build):
             }
             if os.path.isfile('installer/picard-setup.nsi.in'):
                 generate_file('installer/picard-setup.nsi.in', 'installer/picard-setup.nsi', {**args, **installer_args})
+                log.info('generating NSIS translation files')
+                self.spawn(['python', 'installer/i18n/json2nsh.py'])
+
             version_args = {
                 'filevers': str(file_version),
                 'prodvers': str(file_version),
@@ -469,7 +472,7 @@ class picard_regen_appdata_pot_file(Command):
             ])
 
 
-class picard_get_po_files(Command):
+class picard_pull_translations(Command):
     description = "Retrieve po files from transifex"
     minimum_perc_default = 5
     user_options = [
@@ -764,7 +767,7 @@ args = {
         'install': picard_install,
         'install_locales': picard_install_locales,
         'update_constants': picard_update_constants,
-        'get_po_files': picard_get_po_files,
+        'pull_translations': picard_pull_translations,
         'regen_pot_file': picard_regen_pot_file,
         'patch_version': picard_patch_version,
     },