No... why? Should we? If I'm in the country where the people speak in english is natural that I must use their lenguage. U don't need to have a perfect grammar, most people will understand u :) Don't worry :)
Shame that u're only 15y beacuse it's easier to learn english when u're drunk.
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Dobrze widzi się tylko sercem. Najważniejsze jest niewidzialne dla oczu.