526
Well yes, but actually no
(jlai.lu)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
Notice none of your proposed examples deal with the grammatical structure (syntax, semantics, morphological relationship), only with lexical variety. An apt comparison is as follows: now, plural words in English end in "r".
Okay, bad examples from my side. Changes that affect grammatical structure might be "bro" becoming popular as a pronoun, new tense structure found in Modern Mandarin or plural adjustments like German Kakteen > Kaktusse. Grammatical structure changes just as much as other aspects of a language.