Installing Dictionaries
- Select a dictionary from the list below, then click "Download" and save the file to disk.
- In Postbox, navigate to File menu > Preferences (macOS) | Tools menu > Options (Windows) > Composition > Typing > Edit Dictionaries.
- Browse to the downloaded dictionary file on disk and install it.
Using Dictionaries
Your default dictionary preference can be set in Preferences (macOS) or Options (Windows) > Composition > Typing > Language.
Within the Compose window, you can quickly switch between dictionaries for the current compose session by clicking and holding the Spelling toolbar button. Once you send, the dictionary will reset to its default language.
Dictionaries
| Afrikaans | Afrikaans | Download |
| Albanian | Shqip | Download |
| Amharic | አማርኛ | Download |
| Arabic | عربي | Download |
| Aragonese | aragonés | Download |
| Armenian | Հայերեն | Download |
| Assamese | অসমীয়া | Download |
| Asturian | Asturianu | Download |
| Azerbaijani | Azərbaycanca (az-ir) | Download |
| Bambara | Bamanankan (bm-ml) | Download |
| Basque | Euskara | Download |
| Belarusian | Беларуская | Download |
| Belarusian Classic | Беларуская | Download |
| Bengali (Bangladesh) | বাংলা (বাংলাদেশ) | Download |
| Breton | Brezhoneg | Download |
| Bulgarian | Български | Download |
| Catalan | Català | Download |
| Catalan (Valencian myspell) | català (valencià) | Download |
| Catalan (Valencian AVL) | català (valencià) | Download |
| Chichewa Spell Check (ny-mw) | Download | |
| Croatian | Hrvatski | Download |
| Czech | Čeština | Download |
| Czech | Čeština (bez diakritiky) | Download |
| Danish | Dansk | Download |
| Diccionario Papiamento (pap-aw) | Download | |
| Dikshonario Papiamentu (pap-cw) | Download | |
| Dutch | Nederlands | Download |
| English (Australian) | English (Australian) | Download |
| English (British) | English (British) | Download |
| English (Canadian) | English (Canadian) | Download |
| English (US) | English (US) | Download |
| Esperanto | Download | |
| Estonian | Eesti keel | Download |
| Eʋegbe Spelling Dictionary (eegbe) | Download | |
| Faroese Spell Checker (Faroe Islands) (fo-fo) | Download | |
| French | Français | Download |
| Frisian | Frysk | Download |
| Friulian | Furlan | Download |
| Gaelic (Scotland) | Gàidhlig | Download |
| Galician | Galego | Download |
| Georgian | ქართული | Download |
| German (Austria) | Deutsch (Österreich) | Download |
| German (Germany) | Deutsch (Deutschland) | Download |
| German (Switzerland) | Deutsch (Schweiz) | Download |
| Greek | Ελληνικά | Download |
| Greek | Ελληνικά (el-en) | Download |
| Gujarati (India) | ગુજરાતી (ભારત) | Download |
| Haitian Creole spell checker (ht) | Download | |
| Hausa | Hausa (ha-gh) | Download |
| Hebrew | עברית | Download |
| Hindi (India) | हिन्दी (भारत) | Download |
| Hungarian | magyar | Download |
| Icelandic | íslenska | Download |
| Indonesian | Bahasa Indonesia | Download |
| Interlingua | Interlingua (ia-ia) | Download |
| Interlingue Spell Checker (ie) | Download | |
| Irish | Gaeilge | Download |
| Italian | Italiano | Download |
| Kashubian | Kaszëbsczi | Download |
| Korean | 한국어 | Download |
| Kurdish | Kurdî | Download |
| Latin | Latina | Download |
| Latvian | Latviešu | Download |
| Lingala | Lingála | Download |
| Lithuanian | Lietuvių | Download |
| Lower Sorbian | Dolnoserbšćina | Download |
| Macedonian | Македонски | Download |
| Malagasy | Malagasy (mg-mg) | Download |
| Malay | Melayu | Download |
| Maori (Aotearoa) | Māori (Aotearoa) | Download |
| Marathi | मराठी | Download |
| Ndebele, South | isiNdebele | Download |
| Nepali | नेपाली | Download |
| Northern Sotho | Sepedi | Download |
| Norwegian (Bokmål) | Norsk bokmål | Download |
| Norwegian (Nynorsk) | Norsk nynorsk | Download |
| Persian | فارسی (fa-ir) | Download |
| Polish | Polski | Download |
| Portuguese (Brazilian) | Português (do Brasil) | Download |
| Portuguese (Brazilian) | Português (do Brasil) (Ortografia Antiga) | Download |
| Portuguese (Brazilian) | Português (do Brasil) (Reforma ortográfica de 2009) | Download |
| Portuguese (Portugal) | Português (Europeu) | Download |
| Punjabi (India) | ਪੰਜਾਬੀ (ਭਾਰਤ) | Download |
| Romanian | Română | Download |
| Russian | Словарь Александра Лебедева | Download |
| Russian | Словарь Александра Клюквина | Download |
| Sanskrit | संस्कृत | Download |
| Serbian | Српски | Download |
| Siswati | siSwati | Download |
| Slovak | slovenčina (sk-sk-ascii) | Download |
| Slovak | slovenčina (sk-sk) | Download |
| Slovenian | Slovenščina | Download |
| Songhai | Soŋay | Download |
| Southern Sotho | Sesotho | Download |
| Spanish (Venezuela) | Español (es-ve) | Download |
| Spanish (Argentina) | Español (de Argentina) | Download |
| Spanish (Chile) | Español (de Chile) | Download |
| Spanish (Mexico) | Español (de México) | Download |
| Spanish (Mexico) | Español (de México) | Download |
| Spanish (Spain) | Español (de España) | Download |
| Swahili | Kiswahili (sw-tz) | Download |
| Swedish | Svenska | Download |
| Tamil | தமிழ் | Download |
| Tamil (India) | தமிழ் (இந்தியா) | Download |
| Telugu | తెలుగు | Download |
| Tsonga | Xitsonga | Download |
| Tswana | Setswana | Download |
| Turkish | Türkçe | Download |
| Turkmen spell checker dictionary (tk) | Download | |
| Ukrainian | Українська | Download |
| Upper Sorbian | Hornjoserbsce | Download |
| Urdu | اُردو | Download |
| Uzbek | Oʻzbek tili | Download |
| Venda | Tshivenḓa | Download |
| Venetan (vec) | Download | |
| Vietnamese | Tiếng Việt | Download |
| Welsh | Cymraeg | Download |
| Xhosa | isiXhosa | Download |
| Yiddish spell checker (YIVO) (yi) | Download | |
| Zulu | isiZulu | Download |