Simple English detection

gistfile1.txt

const unicode = {
  basic_latin: /[\u0020-\u007F]/g
}

console.log('賛美歌い続ける'.search(unicode.basic_latin)) // -1
console.log('Sanbi utaitsuzukeru'.search(unicode.basic_latin)) // 0
console.log('10,000 Reasons'.search(unicode.basic_latin)) // 0
console.log('Bless the Lord oh my soul'.search(unicode.basic_latin)) // 0

/*
We have English and Japanese lyrics in our church services and I needed
a quick way to differentiate between the two in a script I use for
slide generation. We never mix the two in the same line.

Tried using franc but it didn't work very well.

This is much simpler and does what we need.
*/