Free variation in the use of a language feature is usually taken as a sign that it has not been fully acquired.
The film is the world's first English language feature to explore the issue of honour killing.
However, certain language features make some kinds of optimizations difficult.
The standard library components were upgraded with new C++11 language features where appropriate.
The second half of 2012 saw many new language features (from recent Delphis) implemented.
In an attempt to resolve this issue, it was proposed that C++11 add the language feature of concepts.
Even a third language features in a small way, as music is taught in Spanish.
The Prototype framework is not to be confused with this language feature.
Several studies show that women adopt widely used language features more easily than men.
In some cases language features may create many duplicate expressions.