Many problems are facen with when learning a foreign language.Because of the differences between the languages , as learners of languages we have difficulties in understanding the rules and logic of languages.If you think for a while and ask the question that ''what kind of differences do people have? '', I can say many things.Firstly,there is a huge logic problem between the languages.For example,while some languages label things as female or male,others don't.Or while a language can call a crowd according to their having a man ,others don't.Morever,the generation of words changes according to the languages.Some of them generates words by adding appendix only to the end of the word.But some of them generates words by adding appendix both to the end of the word and beginning.The matters go so .Still, It is worth learning a language