He's right, though - "Basic English" contains only 850 words.
English is one of the easiest languages in the world to speak at a basic level, yet one of the most difficult to speak fluently. If you have studied any other language, this will become obvious to you very quickly. Unlike every other European language, English has no gender of noun, no informal and formal second person, its verbs are with only a few exceptions totally straightforward.
Yesterday I go[i to London.
Today I [i]go[i] to London.
Tomorrow I [i]go[i] to London.
This would be unthinkable in lots of languages.
Yet, there are some aspects of English which are (almost) impenetrable to learners, specifically our phrasal verbs.
Almost as soon as the batsman had [i]run out[i] onto the field, he was [i]run out[i] for a duck, his luck having completely [i]run out].