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.
As children develop their language skills, they give up these assumptions and learn new words and meanings. From this point on, children develop language skills rapidly. Here is a typical sequence: At about 18 months, children add new words to their vocabulary at the astounding rate of one every 2 hours. By age 2, most children have 1 to 2,000 words and combine two words to form simple sentences such as: Go out.. All gone.. Between 24 to 30 months, children speak in longer sentences.