File | Settings | Editor | Natural Languages for Windows and Linux
WebStorm | Preferences | Editor | Natural Languages for macOS
Ctrl+Alt+S
Use this settings page to select the languages in which WebStorm should check texts for typos, spelling mistakes, grammatical errors, and so on. Out of the box, WebStorm includes English language support. See Natural languages for details.
Languages
Item
Shortcut
Description
Alt+Insert
Click this button to add a new language to the list.
Alt+Delete
Click this button to remove the selected language from the list.