https://codsen.com/os/is-language-code
is-language-code open source npm package | Codsen
Is given string a language code (as per IANA)
open source npm packagelanguagecodecodsen
https://codsen.com/os/string-match-left-right
string-match-left-right open source npm package | Codsen
Match substrings on the left or right of a given index, ignoring whitespace
open source npm packageleft rightstringmatchcodsen