Sorry, I did not understand this sentence. Could you elaborate a bit more?

Suppose someone names all of his variables and functions after the titles of Led Zeppelin songs. How does a language prevent that? Yet it's a maintenance problem.

Suppose someone refuses to use built-in aggregate data types and rolls his own. How does a language prevent that? Yet it's a maintenance problem.

Suppose someone refuses to use built-in string handling functions and rolls his own. How does a language prevent that? Yet it's a maintenance problem.

Suppose someone has a program which watches the commits and reverts all changes to a section of code he feels that he owns. How does a language prevent that? Yet it's a maintenance problem.

Suppose someone has a penchant for writing long, long functions because "the overhead of setting up call frames is too much for this critical path" and you end up with thousand-plus line monsters. How does a language prevent that? Yet it's a maintenance problem.

Suppose someone writes a god object and couples it to the internals of every other object in the system. How does a language prevent that? Yet it's a maintenance problem.

In my mind, all of these problems are much more important than "Wow, I've never seen that particular bit of syntax before", but somehow people get caught up on the idea that syntax and idioms matter more.