Update list of supported languages to reflect which replacements are disabled by default

[samimaat]

I wanted to use Swedish replacements (actually Finnish, but for my purposes they are the same thing) and struggled for awhile, because I couldn't understand how to get them to work. In the end I commented out Latin and English, which conflicted with Swedish/Finnish.

If this is the intended way to change the transliteration, I would suggest adding "disabled (commented out) by default in replacements.js" to the supported languages list in the readme. I could do this if the issue is this straightforward.