Swordfish automatically spellchecks your text as you type.

On macOS, Swordfish uses the native spellcheking API provided by the Operating System. By default, macOS tries to guess your writing language and may not provide accurate spellcheking. You can configure macOS to use a specific language following the steps from the Spellchecking on macOS section.

On Windows and Linux, Swordfish uses Hunspell dictionaries from the Chromium project. Dictionaries are downloaded automatically by the program when they are available for the selected target language.

If your target language is English, Spanish or Portuguese, you need to tell Swordfish which language variant to use for spellchecking, following the steps from the Spellchecking on Windows and Linux section.