Two weeks ago I made the keyword "?English" as a Hatena-Diary-Club, but I have never used this keyword. The reason is because I don't have any topics I should write not in Japanese but in English. I can't express my thought better in English than in Japanese, and I don't think to send any topics to foreigner. There is no necessity of English.
But I want to write in English to kill time, so I'll look for the topics to write in English.