First: thanks for LO, great work.

On a fresh install of LO 6.2.0 on MacOS 10.13.6, I clicked on a Help icon, which opened a browser at URL file:///Applications/LibreOffice.app/Contents/Resources/help/index.html
However the displayed page was blank.  Browser console revealed an error in languages.js: "Unexpected token: var"

Discovered languages.js in above dir was not valid JS; it had "-n" at the start of each line and no commas between the language ID strings.

The installed languages.js looked like this:
  -n var languagesSet = new Set([
  -n 'en-US'
  -n 'am'
...etc

It clearly was intended to look like this:
  var languagesSet = new Set([
  'en-US',
  'am',
  'ar',
...etc

A quick edit to the second style fixed this and docs in browser worked fine thereafter.