Learning new languages can be hard. If they are too similar, you will grow conflicting knowledge until your skill has risen enough. If the concepts are too diff

Learning new languages can be hard. If they are too similar, you will grow conflicting knowledge until your skill has risen enough. If the concepts are too different, you will also constantly have conflicts with your established knowledge and habits. If you have already a high skill, you will have also the demand to reach a similar skill in any new language, and any hurdle will be seen as a problem. The amount of tiny issues and slow pace can give people the impression of being hard, even if reality is quite different. Hard or easy is a matter of perception, and everyone sees things different.