While PHP5 gaining popularity development of PHP6 is in progress. The main upgrade happens is the Unicode support for almost all php functions. Check the complete upgrade plans on developers meeting notes.
With PHP6 new features we can mix Unicode in code. See the fun.
See PHP developer Andrei Zmievski’s talks on Unicode in PHP6.
With this upgrade possibilities of developing libraries in Unicode languages, and using them to code applications in mother tongue is possible.Coding in Malayalam, Hindi or Arabic will go smooth. Not need to know English to do a computer programming then :).