June to August in Europe is known as High Season (which means you can expect wonderful summer weather but the downside is quite a few crowds). Any destination in Europe will be a great destination during high season.
If you really put your mind to it, and constantly expose yourself to a language then you may find that you can speak it with relative ease within about 6 months, although as mentioned before, you would really need to be living in a country that speaks that language in order to get to this stage.
Nothing like it. Learning a programming language is like learning to fill out a long form*, while learning a foreign language is like learning to paint. * okay, a bit more creative than that, but essentially you have an existing structure and only have limited options what you can fill in each spot.