Is this limited to English? I've interviewed some appallingly bad programmers with PhDs from top-5 CS departments. I'm sure they had high IQs, but they were awf

Is this limited to English? I've interviewed some appallingly bad programmers with PhDs from top-5 CS departments. I'm sure they had high IQs, but they were awful programmers and, thus, in the context I cared about, were stupid.