Add words to OS X’s valid words list, as in, remove warnings about words like
npm.
Tested on OS X 10.10 (Yosemite), 10.13 (High Sierra), 10.14 (Mojave), might work earlier.
If a language is specified, the language designator (ISO 639-1 or ISO 639-2)
must be lower-case, e.g., nl.
When a region designator (ISO 3166-1) is added, it must be all-caps and
preceded by an underscore, e.g., en_GB.
Ensure the language is enabled in System Preferences > Keyboard >
Text > Spelling > Set Up....
When adding a word to a language which has region designators (such as English,
which has British and more), YOU MUST SPECIFY THE REGION TOO.
In the case of British, specifying en will not work, but en_GB will.
npm:
npm install osx-learn --globalUsage: learn [options] <word> [language]
Options:
-h, --help output usage information
-v, --version output version
Examples:
$ learn npm
$ learn stringification en_GB
See also: man 1 learn