If Emacs doesn't have enough input methods, you can add one reasonably easily... A good deal of early-ish work on multilingual support in Emacs was done out of

If Emacs doesn't have enough input methods, you can add one reasonably easily... A good deal of early-ish work on multilingual support in Emacs was done out of interest in editing technical text, which is basically the same problem as more-or-less complex natural language scripts (which deserve support anyway, of course).