Sometimes Linguix does not flag some words that seem to be written in the US style when the UK dialect is set up. This might be when the issue is not exactly a mistake in the UK English,
For example, take the word "summarise" – this version with "s" is more common in British English. However, "summarize" can also be found frequently. Instead, in the US the s-version is so rarely used, that it would be considered a typo. The current logic is works like this.
Our policy here at Linguix to show only 100% mistakes.