Regular expression for non-english characters

r, regex, special-characters

Solution

You may use `[^[:ascii:]]` PCRE regex:

x = c('Kält', 'normal', 'normal with, punctuation ~-+!', 'normal with number 1234')
grep(pattern = "[^[:ascii:]]", x, perl=TRUE) 
grep(pattern = "[^[:ascii:]]", x, value=TRUE, perl=TRUE)

Ouput:

[1] 1
[1] "Kält"

See the R demo

Problem

I need to check if some strings contain any non-English characters. ``` x = c('Kält', 'normal', 'normal with, punctuation ~-+!', 'normal with number 1234') grep(pattern = ??, x) # Expected output:1 ```

Original source