Hi! Practise and Practice have the same meaning so to practice or to practise English are the same however in many parts of the English speaking world (UK, Ireland, Australia, Canada, and South Africa) “practice” is the noun, “practise” the verb so they don't use practice as a verb they only use it as a noun.(they can't say "to practice English")

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So well, we must write other as I want to improve English skills (but not I want to practise English). That is common mistake that I see who learn English.

dehyadjouani is right - certainly for Britain. I can't speak for the other countries. Certain words follow this spelling pattern in British English. 'to practise', 'to advise', 'to license' but 'some practice', 'some advice', 'a licence'. Of course, in US English 'advise' and 'advice' have the same distinction as in British English - this one is easy because of the pronunciation difference.