[wolco2]

A system to introduce new words in English exists and it is not anarchic. It's a democratic or popularity contest where if a word is used enough it becomes part of the language and accepted. Dictionaries have standards where a word must appear in print a number of times to be accepted.

Other languages are less dynamic so they are less responsive to introducing new words. Some of those and others controlled by official bodies which may or may not represent the population are less popularity driven. In those cases a guardian relationship exists where words are vetting by others. English is vetted by all.

[coliveira]

That's not true at all, this process doesn't happen just in the English language. Most languages evolve the same way, new words are introduced to the lexicon through the spoken language, newspapers and books, and later added to dictionaries. For example, in German the Duden is printed every five years with new recent words added. The same in happens in other countries where academics create new vocabularies based on current usage.