Spark Mail sets its language automatically based on your macOS system language. However, it doesn’t support all language variants. For instance, if you’re using Traditional Chinese as your system language, Spark Mail will default to Simplified Chinese since it doesn’t support Traditional Chinese. Unfortunately, even using customized language settings on macOS doesn’t let you set Spark Mail to English.

If you’re in this situation, here’s how to set Spark Mail to a different language of your choice.

Steps to Change Spark Mail Language

Follow these steps to identify your app installation type and change Spark Mail’s language setting.

Step 1: Open Terminal

First, open Terminal on your Mac. You can find Terminal in Applications > Utilities or by searching for “Terminal” in Spotlight.

Step 2: Identify Your Spark Mail Installation Type

The app identifier varies depending on where you downloaded Spark Mail. This will help determine the identifier needed to update the language setting.

1. If you downloaded Spark Mail from the App Store or the Spark website, run this command in Terminal:

osascript -e 'id of app "Spark Desktop"'

You should see one of these responses:

• com.readdle.SparkDesktop (for installations from the Spark website)

• com.readdle.SparkDesktop.appstore (for installations from the App Store)

2. If you downloaded Spark Mail from Setapp, run this command in Terminal:

osascript -e 'id of app "Spark Mail"'

This should return:

• com.readdle.SparkDesktop-setapp

Step 3: Change the Default Language

Based on the identifier from Step 2, run the command below in Terminal to set the default language.

• App Store installation:

defaults write com.readdle.SparkDesktop.appstore AppleLanguages '("en")'

• Website installation:

defaults write com.readdle.SparkDesktop AppleLanguages '("en")'

• Setapp installation:

defaults write com.readdle.SparkDesktop-setapp AppleLanguages '("en")'

Step 4: Restart Spark Mail

After running the command, close and restart Spark Mail to apply the new language setting.

By following these steps, you can change Spark Mail to English now.