A lot of people learn programming before their English skills are good enough to participate in international forums like this one. At least it was true for me. The success of a programming language also depends on multi-lingual literature. Languages like C++, Java and PHP are very accessible because book stores are full with books to learn those languages. English books often simply don't make it into the book stores.

Pascal did had good very literature available in the Turbo Pascal days. A Delphi book is not that hard to find nowadays, but the situation has worsened a lot.

We could compensate by making our web sites available in more languages, but this is of course a lot of work.