Response:
In the UK we mostly speak English as the first language. But software such as WordPress is written in American English, not British English.
For an internationalised application the output of text strings may be translated and therefore the localised version behaves slightly differently.
How would you translate check color
to British English? Probably to check colour
but cheque colour
may be valid in a banking application.
It’s a lot more obvious with foreign languages when there are words and / or character sets you don’t understand.
Alternatively, the question may also refer to the programming language you’re using. When was the last time you accidentally wrote PHP in a JavaScript file, or put an HTML <script>
tag into a CSS file?
Reference: