It is not used by any language. There is no need to check for it in
LoadVoice().

From now on, stressLength must be set before stressAdd because
stressLength will overwrite any previous value. Usually stressLength is
set in a language file and stressAdd in a voice file.

Previously the order of the two commands didn't matter.

cmn now handles all latin characters as English.

The old functionality of assuming latin characters are pinyin can be
achieved with new language cmn-Latn-pinyin.

See discussion in #933.

Co-authored-by: Sebastien Le Maguer <[email protected]>

When set in a language file, a period followed by a lower case letter is
detected as end of sentence. Normal behavior is to require a capital
letter.

I forgot to add fa: to previous commit message 4967418.