English, like other languages, gets new words and grammar from other languages. Its not too hard to learn if you dont care about being grammatically correct, but its more of the reading and writing correctly that will get you IMO...
Nothing is difficult in this world and easy also , why you speak ur mother tongue easily because you heard it more and u also speak it much ...If you want to learn any language just practice it..
English has a fairly large number of phonemes, some with only small differences ("beard, bared, bird, bored") and is quite flexible in its syllable structure, may then speak languages that can contain only consonant-vowel syllables find words such as strength or ask difficult.
It's not difficult language if you speak it in general. It is difficult when you speak with grammar. Grammar is first and the most important thing while reading and writing English so if one really wish to improve English then he need to improve grammar.